Math, asked by puvvadajaidhev, 4 months ago

Simplify
i) cos 100°.cos 40° +sin 100°.sin 40°

Answers

Answered by yashaswini3679

7

cos 100°.cos 40° +sin 100°.sin 40°

cos A cos B + sin A sin B = cos (A - B)

cos (100 - 40)

cos 60°

1/2

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