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prove:a(cosA+cosB) =2(a+b)sin 2 a/2


prove:a(cosA+cosB)


=2(a+b)sin2a/2


Grade:11

2 Answers

darji yash
30 Points
8 years ago

something wrong in que.

because in right side there is no "A"and "B".

Shaurya Gupta
41 Points
8 years ago

its wrong

i solved it it came 2(a+b)sin2c/2

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