Math, asked by 4minar, 5 months ago

cos (A + B) = cos A cos B – sin A sin B ….. (1)

cos (A – B) = cos A cos B + sin A sin B ….. (2)
please add.

Answers

Answered by Anonymous

16

Step-by-step explanation:

the answer is 2cosAcosB ..........

cos2A = 2 cosAcosB

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