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In DeltaABC prove that (b-c)^(2)cos^(2)....

In `DeltaABC` prove that `(b-c)^(2)cos^(2).(A)/(2)+(b+c)^(2)sin^(2).(A)/(2)=a^(2)`

Text Solution

Verified by Experts

The correct Answer is:
`a^2`
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