In a triangle ABC, `A - B =120 ^(@) and R = 8r,` then the value of cos C is

In a triangle ABC, If A=B=120^(@) and R=8r, then the value of cosC is

In a triangle ABC, If A=B=120^(@) and R=8r, then the value of cosC is

In DeltaABC," if " A-B=120^(@) and R=8r , then the value of (1+cosC)/(1-cosC) equals : (All symbols used hav their usual meaning in a triangle)

In DeltaABC," if " A-B=120^(@) and R=8r , then the value of (1+cosC)/(1-cosC) equals : (All symbols used hav their usual meaning in a triangle)

In triangle ABC, if A - B = 120^(2) and R = 8r , where R and r have their usual meaning, then cos C equals

In triangle ABC, if A - B = 120^(2) and R = 8r , where R and r have their usual meaning, then cos C equals

In triangle ABC, if A - B = 120 and R = 8r , where R and r have their usual meaning, then cos C equals

In a triangle ABC, if r_1 + r_3 + r = r_2 , then find the value of (sec^2 A + cos^2 B-cot^2 C) ,

In triangle ABC, if A-B=120^(@) and R=8r, where R and r have their usual meanings,then cos C equal (a) (3)/(4) (b) (2)/(3)(c)(5)/(6) (d) (7)/(8)

In triangle ABc, if A-B=120^(@) and R=8r where R r have their usual meaning then cos C equals