`sinAsin (A+ 2B) -SinBsin(B +2A)= sin (A- B)sin(A+B) `

sin A sin (A + 2B) sin B sin (B + 2A) = sin (AB) sin (A + B)

Prove that: sin(A+2B)sinA-sinBsin(2A+B)sinB=sin(A+B)sin(A-B)

Prove that: sin(A+2B)sinA-sinBsin(2A+B)sinB=sin(A+B)sin(A-B)

Prove the sinA.sin(B-C) + sinB.sin(C-A) + sinC.sin(A-B) = 0

Prove that sin ( A + B) sin (A - B) = sin^(2) A - sin^(2)B .

Prove that : sin (A + B) sin (A - B) = sin^2A- sin^2B .

Prove that sin^(2)(A + B) - sin^(2)(A - B) = sin 2A sin 2B

If A + B + C =180^@ , prove that : sin (B + 2C) + sin (C + 2A) + sin (A + 2B) = 4 sin frac (B-C)(2) sin frac (C-A)(2) sin frac (A-B)(2) .

Prove that: (sin(A-C)+2sin A+sin(A+C))/(sin(B-C)+2sin B+sin(B+C))=(sin A)/(sin B)

sin 2A + sin 2B + sin 2 (A-B)= A) 4 sin A * sin B * sin (A-B) B) 4 sin A * cos B * cos (A-B) C) 4 cos A * sin B * cos (A-B) D) 4 cos A * cos B * sin (A-B)