Math, asked by sushmi1420, 10 months ago

cos^2(37degree) - sin^2(53)degree

Answers

Answered by sabrinanandini2

4

cos²37 - sin²53

= cos²(90-53) - sin²53 (∵ 37 = 90 - 53)

= sin²53 - sin²53 (∵ cos(90-Ф) = sinФ)

= 0

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