Math, asked by sonali6642, 1 year ago

what is the formula for cos (x+y)+cos(x-y)

Answers

Answered by mvirajprabhup0qivw

3

Answer:

cos(x+y) +cos(x-y) =2cosxcosy

Answered by Anonymous

3

Heya..

2 Cos (x) Cos (y) is ur formula

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