(sin2A+sin2B)/(sin2A-sin2B)

Prove the following : sin2A+sin2B+sin2C-sin2(A+B+C) 4sin(B+C)sin(C+A)sin(A+B)

(sin(A+3B)+sin(3A+B))/(sin2A+sin2B)=2cos(A+B)

(sin(A+3B)+sin(3A+B))/(sin2A+sin2B)=2cos(A+B)

If A+B+C=180^(@) , (sin2A+sin2B+sin2C)/(sin A+sin B+sin C)=K sin(A)/(2)sin(B)/(2)sin(C)/(2) then the value of 3K^(3)+2K^(2)+K+1 is equal to

If A+B+C= 180^(@) , " then " ( sin 2A- sin 2B- sin 2C)/(sin 2B- sin 2A - sin 2C)=

Prove the following : sin2A+sin2B+sin2(A-B) = 4sinA.cosB.cos(A-B)

If A+B+C=0^(@) then prove that sin2A+sin2B+sin2C=-4sin A sin B sin C

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

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

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