Math, asked by raguladilip2004, 4 months ago

310
7. If A+B+C=
then prove that
2
thw
cosA + cos²B - cos’C = - 2cos A cos B sin C.
G sin 2A + sin 2B
sin 20

Answers

Answered by rahulmandal92119211

0

Answer:

First mark me as brainliest

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