Math, asked by tanishq8485, 1 year ago

cos2 = sin (A-15) find A

Answers

Answered by Amarshyam

Answer:

Step-by-step explanation:

cos 2A = sin (A - 15)

cos 2A = cos ( 90 - (A - 15) )

2A = 90 - A + 15

3A = 105

A = 35

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