Math, asked by iamsweptyy, 10 months ago

Prove that 2 cos(x) cos(y) = cos(x + y) + cos(x − y)

Answers

Answered by kowshikpolisetty9

1

Answer:

cos(x+y)=cosxcosy-sinxsiny&cos(x-y)=cosxcosy+sinxsiny

Answered by Lipsa133

0

Step-by-step explanation:

hope this will help you...

plzz mark my answer as brainlist....

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