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anonymous

  • one year ago

Finding angles!

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  1. anonymous
    • one year ago
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  2. Nnesha
    • one year ago
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    same question like we did before

  3. hartnn
    • one year ago
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    a and c are given concentrate on Angle A! we have opposite side and hypotenuse! which trigonometric ratio will you use?

  4. anonymous
    • one year ago
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    Nnesha it was wrong though :) by the way I found out that he doesn't want the degree symbol

  5. Nnesha
    • one year ago
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    do you mean 28 and 62 was wrong ??

  6. anonymous
    • one year ago
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    it said undefined when I entered it

  7. anonymous
    • one year ago
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    hartnn do we set up a proportion only using 90?

  8. Nnesha
    • one year ago
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    what ?? o.O

  9. Nnesha
    • one year ago
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    alright i'll check it out let i'll try t ofind what was wrong .... hmmm

  10. hartnn
    • one year ago
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    setup a trignometric proportion, what will be sin A?

  11. shaik0124
    • one year ago
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    length b is 4

  12. hartnn
    • one year ago
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    and yes, if one of the angles in a triangle is 90, only then we can use the definitions of trigonometric ratios

  13. anonymous
    • one year ago
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    sin A=a/5

  14. hartnn
    • one year ago
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    a is given to be 3!

  15. anonymous
    • one year ago
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    sinA=3/5 :)

  16. hartnn
    • one year ago
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    so you can find the angle A now?

  17. shaik0124
    • one year ago
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    for length b apply pythagoras theorem

  18. anonymous
    • one year ago
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    hartnn, if i'm not mistaken wouldn't you need to take the inverse of sin-1(3/5)?

  19. hartnn
    • one year ago
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    yes thats correct

  20. anonymous
    • one year ago
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    I got 36.8, but since they want exact measures that would be 37 degrees

  21. shaik0124
    • one year ago
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    a^2+b^2=c^2 32+b2=52 9+b2=25 b2=25-9 b2=16 b=4

  22. hartnn
    • one year ago
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    its weird that they need the measure of angles without decimals. yes, go with 37

  23. hartnn
    • one year ago
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    they want "EXACT" measures and also not in decimals :P lol

  24. anonymous
    • one year ago
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    XD I don't know I don't write these problems :D for sin(b), the proportion would equal sin-1(4/5)

  25. hartnn
    • one year ago
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    one shortcut way to find B is to use the fact that sum of all angles in a triangle is 180 :)

  26. Nnesha
    • one year ago
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    that's exactly how we solved first question so 28 was the correct answer

  27. anonymous
    • one year ago
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    hartnn I wasn't sure if that would be accurate because we rounded lol

  28. shaik0124
    • one year ago
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    :) 90+A+B=180

  29. Nnesha
    • one year ago
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    28+62+90 =180 \(\huge\color{green}{\checkmark}\)

  30. anonymous
    • one year ago
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    but for sin(b) I got 53 degrees

  31. hartnn
    • one year ago
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    so probably we can expect that 37 here will be given wrong :P

  32. hartnn
    • one year ago
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    yes, B = 53 if rounded

  33. anonymous
    • one year ago
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    it mentions that it's wrong :/

  34. Nnesha
    • one year ago
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    ouch again!

  35. shaik0124
    • one year ago
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    HAha enjoy sana

  36. anonymous
    • one year ago
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    Nnesha yea :/ it's really annoying

  37. hartnn
    • one year ago
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    try 36.86 if that doesn't work, try \(\arcsin(3/5)\) if that doesn't work, not sure what will :P

  38. shaik0124
    • one year ago
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    atleast the answer i gave length b =4 is correct :)

  39. Ac3
    • one year ago
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    stop it wants the exact value

  40. Ac3
    • one year ago
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    decimals will not work

  41. Ac3
    • one year ago
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    I don't see how it wants you to get the exact angle if it's not even on the unit circle

  42. hartnn
    • one year ago
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    did \(\arcsin(3/5) \) work ?

  43. Nnesha
    • one year ago
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    whats ur instructor sayz? did he replid ?

  44. anonymous
    • one year ago
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    hartnn Will try arcsin 3/5, but I have one last attempt before I get a new problem

  45. anonymous
    • one year ago
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    Nnesha not yet but it mentioned how it doesn't want the degree symbol

  46. hartnn
    • one year ago
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    don't go for 36.86 they specifically mentioned no decimals...

  47. Ac3
    • one year ago
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    if it doesn't want the degree symbol it probably wants it in that form arcsin(3/5)

  48. anonymous
    • one year ago
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    and for b? arcsin(4/5)?

  49. Nnesha
    • one year ago
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    right

  50. Nnesha
    • one year ago
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    B* b=4

  51. anonymous
    • one year ago
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    guyssss it's correct :D thank you a lot all of you

  52. anonymous
    • one year ago
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    they just wanted the arcsin

  53. hartnn
    • one year ago
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    yaaaaay! :D

  54. Ac3
    • one year ago
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    sometimes it's just a matter of following the directions

  55. anonymous
    • one year ago
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    Ac3 sometimes the directions aren't so clear :D

  56. Ac3
    • one year ago
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    Well it was in bold.

  57. Ac3
    • one year ago
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    lol

  58. anonymous
    • one year ago
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    Ac3 XD anyways

  59. Ac3
    • one year ago
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    lol if you need any help i'll be online for a bit.

  60. hartnn
    • one year ago
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    move on to next problem!

  61. anonymous
    • one year ago
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    hartnn will do :) thanks again

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