Math, asked by bapupartha820, 2 months ago

aple 5 :
Prove that
cos2A + cos2B + cos2C + cos 2(A + B + C) = 4 cos (B+C) cos (C + A) cos (A + B)

Answers

Answered by rameshkumarsharma235

0

11 karod and 1000 video please start meeting maths class

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