Math, asked by vikasshelkar, 10 months ago

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

Answers

Answered by ᎷíssGℓαмσƦσυs

4

Answer:

cos (A+B)+cos(A-B)

cosAcosB-sinASinB+cosAcosB+sinAsinB

2cosACosB

this is your answer

Answered by HarishER

0

cos( A+B)+cos(A-B) = 2cosA.cosB

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