Math, asked by mahboob122003, 11 months ago

CODOWY
Convert cos 4A + cos 6A into product.

Answers

Answered by physisit

0

Answer:

cos x + cos y = 2 cos x+y/2 cos x-y/2

cos 4A +cos 6 A = 2 cos 4A+6A/2 cos 4A -6A/2

= 2cos 5A cos -A

=2cos 5Acos A (since cos -A = cos A)

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