[" Ex.1) In "Delta ABC" prove that "],[" i) "sin2A+sin2B-sin2C=4cos A cos B sin C]

If A+B+C=pi , prove that sin 2A+sin 2B-sin 2C=4 cos A cos B sin C

If A+B+C=180^(@), prove that sin2A+sin2B-sin2C=4cos A cos B sin C

If A + B + C= pi , prove that sin 2A + sin 2B -sin 2C =4cos A cos B sin C

If A+B+C=pi then prove that sin2A-sin2B+sin2C=4cos A sin B cos C

If A+B+C=pi , prove that sin 2A-sin 2B+sin 2C=4cos Asin B cos C.

If A, B, C are angles of a triangle , prove that sin 2A+sin 2B-sin 2C=4cos Acos B sin C

In any Delta ABC ,prove that (sin B)/(sin C)=(c-a cos B)/(b-a cos C)

If A+B+C=pi/2 prove the following (i) sin 2A+sin 2B +sin 2C=4 cos A cos B cos C (ii) cos 2A +cos 2B+cos 2C=1+4 sin A sin B sin C.

In any Delta ABC, prove that: (sin B)/(sin C)=(c-a cos B)/(b-a cos C)