If in a triangle ABC a:b:c = 2:4:5, then the value of (8.cosB.cosC + 64.cos C.cos A + 125.cos A.cos B)/(1 - 2.cos A.cos B.cos C) is- A) 20 B) 35 C) 40 D) None I am getting none as the answer. Is it correct?
Follow Math Help Forum on Facebook and Google+
Hello, fardeen_gen! If in a triangle find the value of: . . . Let: . Law of Cosines:. Then: . . . . . . . . . . . . . . .
View Tag Cloud