Math, asked by yadavavizeet01, 29 days ago

4cos a.cos(60-a).cos(60+a)=cos3a

Answers

Answered by GeniusYH

3

Answer:

cos(3x)

Step-by-step explanation:

Please refer the attached picture for the proof.

Hoping that I have not made any mistakes, You're welcome.

Hope you have found my answer useful. If my answer deserves a brainliest, do mark it.

GeniusH

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