Question

In any triangleABC, prove that sin (B-C/2) = (b-c/a) cosA/2 ​

Answer 1

For any triangle ABC prove that Sin B-C/2=B-C/A cos A/Let a/sin A = b/sin B = c/sinC = k Then, a = k sinA, b = k sinB, c = k sinC RHS b-c/a cos A/2 = (ksinB ...

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