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mckenzieandjesus

  • one year ago

what is the tangent ratio for <h?

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  1. mckenzieandjesus
    • one year ago
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    |dw:1435093915953:dw|

  2. freckles
    • one year ago
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    is H the same as h?

  3. mckenzieandjesus
    • one year ago
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    yes

  4. freckles
    • one year ago
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    ok do you know what side is not touching angle H (this is the opposite side) what measurement does this side have?

  5. mckenzieandjesus
    • one year ago
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    5?

  6. freckles
    • one year ago
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    yes the opposite side measurement is 5 now we just need to identify the adjacent side and it's measurement

  7. freckles
    • one year ago
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    the adjacent side is the side touching the angle (that isn't the hyp)

  8. mckenzieandjesus
    • one year ago
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    12?

  9. freckles
    • one year ago
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    that is right

  10. freckles
    • one year ago
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    now you just put your opp/adj and you have your tangent ratio

  11. freckles
    • one year ago
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    for angle h that is :)

  12. freckles
    • one year ago
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    or H

  13. freckles
    • one year ago
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    since H=h

  14. mckenzieandjesus
    • one year ago
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    do i do 5/12

  15. freckles
    • one year ago
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    yep

  16. mckenzieandjesus
    • one year ago
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    it says 0.4166666667

  17. freckles
    • one year ago
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    I would leave it as just 5/12

  18. freckles
    • one year ago
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    are you suppose to round it ?

  19. mckenzieandjesus
    • one year ago
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    oh 5/12 is the answer lol

  20. mckenzieandjesus
    • one year ago
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    no lol

  21. freckles
    • one year ago
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    yes we already found the tangent of angle h earlier it look like you were trying to round the answer

  22. mckenzieandjesus
    • one year ago
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    Thank you!(: can u help me with one more?

  23. freckles
    • one year ago
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    maybe

  24. freckles
    • one year ago
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    :p

  25. mckenzieandjesus
    • one year ago
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    i thought u were telling me to divide the two lol

  26. mckenzieandjesus
    • one year ago
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    sorry got confused but the answer is 5/12

  27. freckles
    • one year ago
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    well 5/12 is a fraction or a division of 5 by 12 but 5/12 is as pretty as the answer will come for that one since it is a repeating decimal

  28. freckles
    • one year ago
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    but anyways what is your other qustion

  29. mckenzieandjesus
    • one year ago
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    yeah i see that now thanks

  30. mckenzieandjesus
    • one year ago
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    it is triangle ABC, AB= 3 and AC=9. Find M<B to the nearest degree.

  31. freckles
    • one year ago
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    is this another right triangle?

  32. mckenzieandjesus
    • one year ago
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    |dw:1435094633296:dw|

  33. mckenzieandjesus
    • one year ago
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    yes

  34. freckles
    • one year ago
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    |dw:1435094708365:dw|

  35. mckenzieandjesus
    • one year ago
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    i think

  36. freckles
    • one year ago
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    yes that is a right triangle (it has a 90 deg angle there)

  37. mckenzieandjesus
    • one year ago
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    ok

  38. freckles
    • one year ago
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    anyways can you identify the sides that are given with respect to the angle in question (that angle being B)

  39. freckles
    • one year ago
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    the words I want you to use are: opposite adjacent hyp

  40. freckles
    • one year ago
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    |dw:1435094797116:dw| what side is this in the picture?

  41. mckenzieandjesus
    • one year ago
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    opposite?

  42. freckles
    • one year ago
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    now you are suppose to be looking at the angle B and I'm asking about the side whose measurement is 3

  43. freckles
    • one year ago
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    that side is actually touching the angle in question

  44. mckenzieandjesus
    • one year ago
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    adjacent?

  45. freckles
    • one year ago
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    yes!

  46. freckles
    • one year ago
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    |dw:1435094881006:dw| now what about the side whose measurement is 9

  47. mckenzieandjesus
    • one year ago
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    ok so 3 adjacent and opposite 9 and hyp b?

  48. freckles
    • one year ago
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    the hyp is the side BC ( the hyp is the side always opposite the 90 deg angle)

  49. freckles
    • one year ago
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    but yes to your other questions

  50. mckenzieandjesus
    • one year ago
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    oh bc i ment

  51. freckles
    • one year ago
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    so we are given opp and adj measurements so I suggest using the tangent ratio again

  52. mckenzieandjesus
    • one year ago
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    3/9?

  53. freckles
    • one year ago
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    |dw:1435094982296:dw|

  54. freckles
    • one year ago
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    opp is 9 and adj is 3 not the other way around

  55. mckenzieandjesus
    • one year ago
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    oh so 9/3

  56. freckles
    • one year ago
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    yes tan=opp/adj

  57. mckenzieandjesus
    • one year ago
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    do i divide?

  58. freckles
    • one year ago
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    amyways you want to solve that equation above and actually yeah it is pretty easy to find a prettier form for 9/3 we call that 3 tan(B)=3

  59. freckles
    • one year ago
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    now you want to solve for B

  60. freckles
    • one year ago
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    so take arctan( ) of both sides

  61. freckles
    • one year ago
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    \[\tan(B)=3 \implies B=\arctan(3)\]

  62. mckenzieandjesus
    • one year ago
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    how would i solve that on calculator?

  63. mckenzieandjesus
    • one year ago
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    my answer choices are 58, 18, 52, 72

  64. freckles
    • one year ago
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    well sometimes the arctan( ) can be done by pressing shift (or 2nd) and then the tan button

  65. mckenzieandjesus
    • one year ago
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    so put tan(3) then what?

  66. freckles
    • one year ago
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    no

  67. freckles
    • one year ago
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    arctan(3)

  68. mckenzieandjesus
    • one year ago
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    i dont have arctan on my calc

  69. freckles
    • one year ago
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    you should see arctan( ) above tan on your calculator

  70. mckenzieandjesus
    • one year ago
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    theres in above tan

  71. freckles
    • one year ago
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    like in maybe a different color

  72. freckles
    • one year ago
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    in?

  73. freckles
    • one year ago
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    what kind of calculator do you have?

  74. mckenzieandjesus
    • one year ago
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    yea the button says in

  75. freckles
    • one year ago
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    maybe I can find a picture of your calculator online and tell you how to use it

  76. mckenzieandjesus
    • one year ago
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    it says casio fx-115ES PLUS

  77. mckenzieandjesus
    • one year ago
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    OK

  78. freckles
    • one year ago
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    according to this calculator you should see arctan( ) above tan( ) they just call it \[\tan^{-1}[ F]\] both of these are the inverse functions of tan they are the same function just different notation

  79. freckles
    • one year ago
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    it is below the Ln key that you call in

  80. freckles
    • one year ago
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    to access the tan^(-1) thing you need to press shift

  81. mckenzieandjesus
    • one year ago
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    got it

  82. mckenzieandjesus
    • one year ago
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    i got 79.5

  83. mckenzieandjesus
    • one year ago
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    oh it was ln not in oops

  84. freckles
    • one year ago
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    you did 3 then arctan( ) and you got 79.5?

  85. mckenzieandjesus
    • one year ago
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    79.51672353

  86. freckles
    • one year ago
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    you should do something like this: second tan 3 or it might be the other way on yours 3 second tan

  87. freckles
    • one year ago
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    http://www.wolframalpha.com/input/?i=arctan%283%29

  88. mckenzieandjesus
    • one year ago
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    it tan^-1 then 3

  89. freckles
    • one year ago
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    you should be getting 71.57 deg

  90. mckenzieandjesus
    • one year ago
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    weird.. nope i got that number above and i typed it in exactly that way..

  91. mckenzieandjesus
    • one year ago
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    so the answer is 72?

  92. freckles
    • one year ago
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    yea but it is important you figure out your calculator

  93. freckles
    • one year ago
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    you might have to use it on a test

  94. mckenzieandjesus
    • one year ago
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    well i typed it in right.

  95. freckles
    • one year ago
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    so when you typed it all in it said this: \\[\tan^{-1}(3)\]

  96. freckles
    • one year ago
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    no other things in it

  97. mckenzieandjesus
    • one year ago
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    yep

  98. mckenzieandjesus
    • one year ago
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    without /

  99. freckles
    • one year ago
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    lol that is not suppose to be there

  100. mckenzieandjesus
    • one year ago
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    ok lol but yep thats what i typed

  101. freckles
    • one year ago
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    ok hmmm: I looked up your little support pdf for your calculator it says you should do this to find arctan(3): shift tan ) =

  102. mckenzieandjesus
    • one year ago
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    i did that too

  103. freckles
    • one year ago
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    well cookies!

  104. mckenzieandjesus
    • one year ago
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    help please? i believe its 35. A child lies on the ground and looks up at the top of a 17-ft tree nearby. The child is 14 ft away from the tree. What is the angle of elevation from the child to the top of the tree? Round to the nearest whole degree.

  105. mckenzieandjesus
    • one year ago
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    yeah thats really weird

  106. mckenzieandjesus
    • one year ago
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    1 Attachment
  107. mckenzieandjesus
    • one year ago
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    actually i think i got that one but need help with my last question

  108. freckles
    • one year ago
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    ok if you insist

  109. mckenzieandjesus
    • one year ago
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    Find the value of x to the nearest tenth. 6.0 8.0 10.9 13.3 |dw:1435096370432:dw|

  110. freckles
    • one year ago
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    and I did get a different answer for that previous one

  111. freckles
    • one year ago
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    well you are given the hyp measurement so you can think about using either sin of cos

  112. freckles
    • one year ago
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    sin or cos*

  113. freckles
    • one year ago
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    let's look at the angle whose measurement is 53 deg

  114. freckles
    • one year ago
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    what is the side whose measurement is x called? choices: adjacent opposite hyp

  115. mckenzieandjesus
    • one year ago
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    cos i believe

  116. mckenzieandjesus
    • one year ago
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    you did what was it?

  117. mckenzieandjesus
    • one year ago
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    adjacent?

  118. freckles
    • one year ago
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    I have gotten arctan(17/14) for the previous one I wonder if you are getting something different again on your calculator for that and for this question |dw:1435096613252:dw| you can not call this adjacent (it isn't touching the angle that I asked you to look at)

  119. mckenzieandjesus
    • one year ago
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    for the child one? opposite sorry

  120. freckles
    • one year ago
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    yes and yes

  121. freckles
    • one year ago
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    let's talk about one problem at a time

  122. freckles
    • one year ago
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    we will come back to the child one (because you know it might get confusing )

  123. freckles
    • one year ago
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    |dw:1435096741024:dw| that one side is always the hyp no matter what angle we decide to look at

  124. freckles
    • one year ago
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    anyways opp/hyp you should think sin function

  125. mckenzieandjesus
    • one year ago
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    the only answers i have fot the child one is 55 degrees, 35 degrees, 51 degrees, and 39 degrees.

  126. mckenzieandjesus
    • one year ago
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    got*

  127. freckles
    • one year ago
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    \[\sin(53^o)=\frac{x}{10}\]

  128. freckles
    • one year ago
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    yes arctan(17/14) does give one of those answers

  129. freckles
    • one year ago
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    |dw:1435096879182:dw|

  130. mckenzieandjesus
    • one year ago
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    its 51 degrees i thought it was either that or 35 degrees and went with 35 oops thank u!

  131. mckenzieandjesus
    • one year ago
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    so for the other question do i type sin(53) in?

  132. freckles
    • one year ago
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    well you need to multiply both sides by 10 to get x by itself

  133. freckles
    • one year ago
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    and yes you can type in sin(53) but you will need to multiply that result by 10

  134. mckenzieandjesus
    • one year ago
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    so 7.39631095?

  135. mckenzieandjesus
    • one year ago
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    would it be 8.0?

  136. freckles
    • one year ago
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    that is almost kinda close to what I got I have 7.986 blah blah

  137. freckles
    • one year ago
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    which is pretty darn close to 8 we got to figure out what is going on with your calculator

  138. freckles
    • one year ago
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    what does your calc say when you enter in just sin(53)

  139. mckenzieandjesus
    • one year ago
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    0.739631095

  140. freckles
    • one year ago
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    hmmm...

  141. freckles
    • one year ago
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    that is really weird should be getting 0.7986355100

  142. mckenzieandjesus
    • one year ago
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    but the real answer that comes up on that site link u gave me is showing what u got

  143. mckenzieandjesus
    • one year ago
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    Yeah i dont know whats wrong with this calculator.. maybe thats why ive gotten answers wrong many times on homework

  144. mckenzieandjesus
    • one year ago
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    The answer is 8.0 then but i really dont know what my calc is doing

  145. freckles
    • one year ago
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    yeah the answer is 8

  146. freckles
    • one year ago
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    i have no double about that

  147. freckles
    • one year ago
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    and your mode is in deg?

  148. freckles
    • one year ago
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    just figured out your problem

  149. freckles
    • one year ago
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    I was able to duplicate your answer for sin(53)

  150. freckles
    • one year ago
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    not degrees

  151. freckles
    • one year ago
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    change the mode and you fixed your problemd

  152. freckles
    • one year ago
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    you have your mode in grads* we need degrees let's see if I can give instructions --- hmmm... you should see mod then deg (and that is what you want but looking it up)

  153. freckles
    • one year ago
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    oh you left :p

  154. campbell_st
    • one year ago
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    if you want to change to degrees Press shift setup(Mode) then choose 3 Deg

  155. mckenzieandjesus
    • one year ago
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    im here

  156. mckenzieandjesus
    • one year ago
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    ok i just changed my mode.

  157. mckenzieandjesus
    • one year ago
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    yay the answer is right on my calc now. thank you so much !

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spraguer (Moderator)
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