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anonymous

  • one year ago

plz help

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    its on the doc.

  3. anonymous
    • one year ago
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    1. B i would love to help.. but i dont know the rest @Michele_Laino help

  4. anonymous
    • one year ago
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    ok thx

  5. Michele_Laino
    • one year ago
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    yes! I confirm, the answer is: \[\frac{1}{{\sin \theta }} = \csc \theta \]

  6. anonymous
    • one year ago
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    help her for the rest

  7. anonymous
    • one year ago
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    im a boy

  8. Michele_Laino
    • one year ago
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    hint: when an object is moving, its position is a function of...?

  9. Michele_Laino
    • one year ago
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    @foxycrew

  10. anonymous
    • one year ago
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    sorry @foxycrew

  11. anonymous
    • one year ago
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    speed

  12. Michele_Laino
    • one year ago
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    I think, it is a function of time, am I right?

  13. Michele_Laino
    • one year ago
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    @foxycrew

  14. anonymous
    • one year ago
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    your on 2 right??

  15. Michele_Laino
    • one year ago
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    yes!

  16. anonymous
    • one year ago
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    is it a

  17. Michele_Laino
    • one year ago
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    I think option D, since frequency is the inverse of time

  18. anonymous
    • one year ago
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    ok thx

  19. Michele_Laino
    • one year ago
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    ok! Let's go to question #3

  20. anonymous
    • one year ago
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    ok

  21. Michele_Laino
    • one year ago
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    hint: we have this relationship: |dw:1434810747850:dw| \[\Large a = c\cos \beta \]

  22. Michele_Laino
    • one year ago
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    so what is the right option?

  23. anonymous
    • one year ago
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    um i say C or B

  24. Michele_Laino
    • one year ago
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    hint: from the preceding formula, we can write: \[\Large \cos \beta = \frac{a}{c}\] there a is the adjacent side with respect to angle \beta, whereas c is the hypotenuse

  25. anonymous
    • one year ago
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    im so lost

  26. Michele_Laino
    • one year ago
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    a is the adjacent side with respect to \beta, right?

  27. Michele_Laino
    • one year ago
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    and c is the hypotenuse

  28. anonymous
    • one year ago
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    idk im on this to help me

  29. anonymous
    • one year ago
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    http://www.themathpage.com/atrig/trigonometry-of-right-triangles.htm

  30. Michele_Laino
    • one year ago
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    so we can write: \[\Large \cos \beta = \frac{a}{c} = \frac{{{\text{adjacent side}}}}{{{\text{hypotenuse}}}}\]

  31. anonymous
    • one year ago
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    so its B.

  32. Michele_Laino
    • one year ago
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    |dw:1434811375224:dw|

  33. Michele_Laino
    • one year ago
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    that's right! It is option B

  34. anonymous
    • one year ago
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    to 4

  35. Michele_Laino
    • one year ago
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    ok! now let's go on question #4

  36. anonymous
    • one year ago
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    i think 4 is d

  37. Michele_Laino
    • one year ago
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    that's right!

  38. anonymous
    • one year ago
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    ya :D

  39. Michele_Laino
    • one year ago
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    :) now let's go on question #5

  40. anonymous
    • one year ago
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    ok

  41. anonymous
    • one year ago
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    90 to 180 ??

  42. Michele_Laino
    • one year ago
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    here we have to consider the graph of the function sin(x), like this: |dw:1434811615558:dw|

  43. Michele_Laino
    • one year ago
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    where the function sin(x) is an increasing function?

  44. anonymous
    • one year ago
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    yes

  45. Michele_Laino
    • one year ago
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    from 90 to 180, I think no, since we have: |dw:1434811790842:dw|

  46. Michele_Laino
    • one year ago
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    so, what is the right option?

  47. anonymous
    • one year ago
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    D.

  48. Michele_Laino
    • one year ago
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    are you sure? please look at my last drawing

  49. Michele_Laino
    • one year ago
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    hint: |dw:1434811920630:dw|

  50. anonymous
    • one year ago
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    um 0 to 90 ??

  51. Michele_Laino
    • one year ago
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    yes! that's right!

  52. anonymous
    • one year ago
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    thx you btw

  53. Michele_Laino
    • one year ago
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    so, it is option B

  54. Michele_Laino
    • one year ago
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    now, let's go on question #6

  55. anonymous
    • one year ago
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    6. How many complete revolutions are needed to draw the angle 725°?

  56. Michele_Laino
    • one year ago
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    yes!

  57. anonymous
    • one year ago
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    it 2 right??

  58. Michele_Laino
    • one year ago
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    that's right! since we can write: \[\Large 725 = 2 \times 360 + 5\]

  59. Michele_Laino
    • one year ago
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    next question #7

  60. anonymous
    • one year ago
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    7. To use the law of sines, which of the following statements must be true? A. All three side lengths must be known. B. At least one side length and opposite angle pair must be known. C. At least two angles must be known. D. The triangle must be a right triangle.

  61. Michele_Laino
    • one year ago
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    hint: the law of sines is: |dw:1434812267441:dw| \[\frac{a}{{\sin \alpha }} = \frac{b}{{\sin \beta }}\]

  62. Michele_Laino
    • one year ago
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    now if I want to compute the value of the side a, I have to use this formula: \[\Large a = b\frac{{\sin \alpha }}{{\sin \beta }}\]

  63. Michele_Laino
    • one year ago
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    so I have to know the angle \alpha, the angle \beta, and the length of the side b

  64. anonymous
    • one year ago
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    um is it B. At least one side length and opposite angle pair must be known.

  65. Michele_Laino
    • one year ago
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    yes! correct!

  66. Michele_Laino
    • one year ago
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    now let's go on question #8

  67. anonymous
    • one year ago
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    8. An angle in a right triangle is identified as θ. If the tangent of θ equals one, what must be true about the triangle side lengths? A. The side opposite to theta is longer than the adjacent side. B. The side adjacent to theta is half the length of the hypotenuse. C. The sides opposite and adjacent to theta are the same length. D. The side adjacent to theta is longer than the adjacent side.

  68. anonymous
    • one year ago
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    i dont get this one its hard

  69. Michele_Laino
    • one year ago
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    hint: |dw:1434812588863:dw|

  70. Michele_Laino
    • one year ago
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    here we can write: \[\Large a = b\tan \theta = b \times 1 = b\] so what can you conclude?

  71. anonymous
    • one year ago
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    i say D.

  72. Michele_Laino
    • one year ago
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    we have a=b a is the side opposite to theta, whereas b is the side adjacent to theta

  73. anonymous
    • one year ago
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    hmm

  74. Michele_Laino
    • one year ago
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    so, what is the right option?

  75. anonymous
    • one year ago
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    a.

  76. Michele_Laino
    • one year ago
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    are you sure? a and b have the same length

  77. anonymous
    • one year ago
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    true

  78. Michele_Laino
    • one year ago
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    so, what is the right option?

  79. anonymous
    • one year ago
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    is adjacent the big one ??

  80. Michele_Laino
    • one year ago
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    no, since they have the same length

  81. anonymous
    • one year ago
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    so opposite ??

  82. Michele_Laino
    • one year ago
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    namely?

  83. anonymous
    • one year ago
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    C. The sides opposite and adjacent to theta are the same length.

  84. Michele_Laino
    • one year ago
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    that's right! correct!

  85. anonymous
    • one year ago
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    9. _______ angles are used to relate the values returned by inverse trigonometric functions to angles larger than 90°. A. Obtuse B. Acute C. Right D. Complementary

  86. anonymous
    • one year ago
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    afk i have to eat sory

  87. Michele_Laino
    • one year ago
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    ok! Please wait I have to go out, I will return as soon as possible

  88. anonymous
    • one year ago
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    ok back

  89. Michele_Laino
    • one year ago
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    here I am @foxycrew

  90. anonymous
    • one year ago
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    ok

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