If sin A + sin B + sin C = 3, then
cos A + cos B + cos C is equal to

If sinA + sin B + sin C=3, then: cos A + cos B + cos C=

If sin A+sin B + sin C =3, then the value of cos A + cos B + cos C is

(sin A-sin B)/(cos A + cos B) is equal to

If : A+B+C=pi, "then" : sin 2A + sin 2 B - sin 2 C= A) 4 sin A * cos B * cos C B) 4 sin B * sin C * cos A C) 4 sin C * cos A * cos B D) 4 sin A * sin B * sin C

If sin A + cos B = a and sin B + cos A = b, then sin (A + B) is equal to

sin A + sin B + sin C = 4cos ((A) / (2)) cos ((B) / (2)) cos ((C) / (2))

If A+B+C=(3pi)/2 . Then cos 2A +cos 2B+cos2C is equal to ................. A) 1-4 cos A cos B cos C B) 4 sin A sin B sin C C) 1+2 cos A cos B cos C D) 1-4 sin A sin B sin C