The perimeter of a triangle ABC iws equal to `2 (sin A+sin B+ sin C).` If `a=1,` then the value of angle A is-

In a triangle ABC, the value of sin A+sin B+sin C is

In Delta ABC, sin A: sin B: sin C is

In a triangle ABC , if cos A cos B + sin A sin B sin C = 1 , then a:b:c is equal to

In a triangle ABC, if cos A cos B+sin A sin B sin C=1, then a:b:c is equal to

In a triangle ABC , if cos A cos B + sin A sin B sin C = 1 , then a:b:c is equal to

In triangle ABC, the value of sin 2A + sin 2B+ sin 2C is equal to

In triangle ABC, the value of sin 2A+sin 2B+sin 2C is equal to

In a triangle ABC . If cos Acos B + sin A sin B sin C = 1 , then sin A + sin B+ sin C =

If A,B,C are interior angles of a triangle ABC such that (cosA+cosB+cosC)^2+(sin A+sin B+sin C)^2=9 then the number of possible triangle is