Math, asked by chhaauhann, 15 days ago

Prove that :
2cospi/13*cos9pi/13 + cos 3pi/13 + cos 5pi/13 = 0

Answers

Answered by shirazialiyazda6913

0

Answer:

Prove that :

2cospi\13°cos9pi + cos 3pi/13 +cosv5pi

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