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

If A + B + C = 180^@ , then prove that sin 2 A+ sin 2B + sin 2C = 4 sin A sin B sin C

Prove that sin2A + sin2B + sin2C = 4sinA · sinB · sin C

If A+B+C=(3pi)/(2) , then show that cos 2A+cos 2B+cos 2C=1-4 sin A sin B sin C .

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

If A+B+C=pi/2 , prove that: sin2A + sin2B+sin2C = 4cosA cosB cosC

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

In a Delta ABC, show that 2R^(2) sin A sin B sin C=Delta.

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

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)