Math, asked by JSATVIK, 9 months ago

cos 12° + cos 84° + cos 132° + cos 156°=

Answers

Answered by Anonymous

3

Step-by-step explanation:

cos 12° + cos 84° + cos 132° + cos 156°

-2 sin 43° Sin (-36)°+ (-2sin 144°Sin(-24)

2 (sin43°sin36° + sin144°Sin24°)

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