Question

Please prove the following.​

Answer 1

Hii

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LHS

sin^2@ + 1 - cis^2@/(1 - cos@)sin@

2 (1 - cos^2@)/(1 - cos@ )sin@

2(1 + cos@)/sin@

4cos^2@/2/2sin@/2cos@/2

2cot@/2

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Answer 2

Answer:

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