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6 August, 13:44

Write the expression as either the sine, cosine, or tangent of a single angle.

sin 48° cos 15° - cos 48° sin 15°

A. cos 33°

B. cos 63°

C. sin 63°

D. sin 33°

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Answers (1)
  1. 6 August, 16:34
    0
    The identity that applies here is:

    sin (A - B) = sinAcosB - sinBcosA

    With A = 48 and B = 15

    Thus,

    sin (48 - 15)

    = sin (33)

    The answer is D.
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