If `A+B+C= pi/2`, show that : `sin^2 A + sin^2 B + sin^2 C=1-2 sinA sinB sinC`

If A+B+C= pi/2 , show that : cos^2 A + cos^2 B + cos^2 C = 2 + 2 sinA sinB sinC .

If A+B+C=pi , show that : 1/2 sum sin^2 A (sin 2B+sin 2C) = 3 sin A sin B sin C .

If A+B+C=pi , prove that : sin2A+sin2B+sin2C=4sinA sinB sinC

If A+B+C=pi and A+B=2C , prove that : 4 (sin^2 A + sin^2 B - sinA sinB)=3 .

If A+B+C = 2pi , show that sin^(3)A+sin^(3)B + sin^(3)C = 3sin A/2* sin B/2* sin C/2 - sin3A/2*sin 3B/2 * sin3C/2

If A+B+C=pi, prove that sin^(2)A-sin^(2)B+sin^(2)C=2sinA cos B sinC

If A+B+C=pi , prove that : sin (B+C-A) + sin (C+A-B) + sin (A+B-C)=4sinA sinB sinC

If A+B+C=pi , prove that : sin^2( A/2) + sin^2( B/2) -sin^2( C/2) =1-2 cos( A/2) cos(B/2) sin( C/2)

Theorem 1:sin2A+sin2B+sin2C=4sin A sin B sin C

If A+B+C = 180^0 , Prove that : sin^2 (A/2) + sin^2 (B/2) + sin^2 (C/2) =1-2 sin (A/2) sin (B/2) sin (C/2)