If `A, B, C ` are angles of a triangle, then S. T `sin 2A -sin 2B + sin 2C=4 CosA sin B CosC`

If A, B, C are the angles of a triangle, then sin 2A + sin 2B - sin 2C is equal to

If A, B, C are the angles of a triangle, then sin 2A + sin 2B - sin 2C is equal to

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

If A, B , C are angles in a triangle, then the sin ^(2)A+sin ^(2)B - sin ^(2) C =2 sin A sin B cos C

If A B C are the angles of a triangle then sin ^(2) A+sin ^(2) B+sin ^(2) C-2 cos A cos B cos C

If A, B, C are the angles of a triangle, prove that sin2A+sin2B+sin2C=4sinAsinBsinC

If A, B, C are angles of a triangle , prove that cos 2A+cos 2B -cos 2C=1-4 sin A sin B cos C

If A , B , C are angles in a triangle , then prove that sin A + sin B + sin C =4 cos. (A)/(2) cos . (B)/(2) cos .(C)/(2)

If A, B, C are angles of a triangle, then sin^(2)A+sin^(2)B+sin^(2)C-2cosAcosBcosC=?