`sinA sin(A + 2 B) – sin B sin(B + 2A) = sin (A - B) sin (A + B)`

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

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

If A,B,C be the angles ofa triangle then prove that (sin A + sin B)(sin B + sin C)(sinC + sinA) gt sin A sin B sinC .

If A + B + C = pi , show that cot A + sinA/(sin B sin C) = cot B + sin B/(sin C sin A) = cot C + sin C/(sin A sin B)

((a^(2) - b^(2) sin A sin B) /( 2 sin ( A- B)))

In a Delta ABC , 2 sinA cos B + 2 sin B cos C + 2 sin cos A = sin A + sin B + sin C, then Delta ABC is

In a Delta ABC , 2 sinA cos B + 2 sin B cos C + 2 sin cos A = sin A + sin B + sin C, then Delta ABC is

If a/(sinA)=K , then the area of "Triangle ABC" in terms of K and sines of the angles is (K^2)/4sin A sin B sin C (b) (K^2)/2sin A sin B sin C 2K^2sin A sin B "sin"(A+B) (d) none