Prove that:
cos 2 x + cos 2 (x + ∏/3)+ cos 2 ( x - ∏/3) = 3/2
prove this fast with respect to class 11th CBSE FORMULAS please
it's quite urgent
Answers
Answered by
1
Answer:
this question is solved by trigonometric fundamental identities
Answered by
1
see this pic I think this better solution
Attachments:
Similar questions