Math, asked by geethukrishna3718, 11 months ago

prove that cosA + cos ( A + 2 pie/3 ) + cos ( A - 2 pie/3 ) = 0

Answers

Answered by soloboyAakash

1

Answer:

cosA +cos(A+2pie/3)+cos(A-2pie/3)

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

=0

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