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25 April, 13:40

Write cos 10 in terms of sine

a. sin 10

b. sin 20

c. sin 170

d. sin 80

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  1. 25 April, 13:54
    0
    d. sin 80.

    Step-by-step explanation:

    Use the identity cos x = sin (90-x).

    So cos 10 = sin (90 - 10)

    = sin 80.
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