Math, asked by vamshireddy98663, 6 months ago

If A+B+C = 1800 then prove that cos 2A-cos 2B+cos 2C =1-4sin Acos Bsin C.

Answers

Answered by brijeshprajapati779

0

Answer:

=−1+4cos

2

A

cos

2

B

cos

2

C

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