In `triangleABC` if `cos A cos B + sin A sin B sin C = 1`, then the value of `(sin^2A)/sin^2B+2sin^2 B/sin^2C+sin^2C/sin^2A` is equal to

In /_ABC if cos A cos B+sin A sin B sin C=1, then the value of (sin^(2)A)/(sin^(2)B)+2(sin^(2)B)/(sin^(2)C)+(sin^(2)C)/(sin^(2)A) is equal to

In a triangleABC, prove that a cos A+b cos B+c cos C=2a sin B sin C

If A+C=2b, then the value of (cos C - cos A)/(sin A-sin C) is-

If cos(A+B+C)=cos A cos B cos C, then find the value of (8sin(B+C)sin(C+A)sin(A+B))/(sin2A sin2sin2C)

If A+B+C=pi, the value of sin2A+sin2B+sin2C=k sin A sin B sin C then value of k is

If A + B + C =pi/2 , prove that : sin^2 A +sin^2 B+sin^2 C= 1-2 sin A sin B sin C .

In DeltaABC,(sin 2A+ sin 2B+ sin 2C)/(sin A + sin B+ sin C)=

If A + B + C =180^@ , prove that : sin^2 A+ sin^2 B-sin^2 C=2 sin A sin B cos C .