English, asked by bojjaakshaya61, 4 months ago

3 T
1. If A+B+C=3π\2
then prove that
(1) cos’A + cos²B - cos’C = - 2 cos A cos B sin C.

Answers

Answered by adithyaa24032006

1

Answer:

please write it properlly not understandable

Answered by shrenik23

0

Answer:

common nekalkar solve karo to aa jay gaga

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