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30 September, 12:16

Which trigonometric function is equal to Cos 4 degrees?

A. Sin 44 degrees

B. Sin 4 degrees

C. Sin 86 degrees

D. Sin 96 degrees

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Answers (1)
  1. 30 September, 13:41
    0
    C

    Step-by-step explanation:

    Using the cofunction identity

    sin (90 - x) ° = cosx°, thus

    cos4° = sin (90 - 4) ° = sin86° → C
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