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(cos^2""(B-C)/2)/((b+c)^2)+(sin^2""(B-C)...

`(cos^2""(B-C)/2)/((b+c)^2)+(sin^2""(B-C)/2)/((b-c)^2)=........`

Text Solution

Verified by Experts

The correct Answer is:
`1/a^2`
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