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30 October, 02:52

Write the expression as the sine, cosine, or tangent of an angle.

sin 57° cos 13° - cos 57° sin 13°

Select one:

a. cos 70°

b. cos 44°

c. sin 44°

d. sin 70°

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Answers (1)
  1. 30 October, 03:11
    0
    Use this formula: sin (x-y) = sinx cosy - cosx siny

    sin57 cos13 - cos57 sin13 = sin (57 - 13) = sin (44)
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