Math, asked by agswapnil693, 6 months ago

cos 100° + sin 70º = cos 40°

Answers

Answered by dhruvsharma1725

2

Step-by-step explanation:

cos 100° + sin70° = cos 40°.

cos100° + (-cos 90°-40°) = cos40°

cos100° - cos 60° = cos40°

cos( 100°- 60° ) = cos40°

cos40° = cos40°

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