If sin A + sin B + sin C = 3, find cos A + cos B + cos C.

Asked by a.behera67 | 20th Oct, 2015, 02:40: PM

Expert Answer:

M a x i m u m space v a l u e space o f space sin e space i s space 1. T h u s space sin A plus sin B plus sin C equals 1 plus 1 plus 1 equals 3 therefore A equals B equals C equals 90 degree rightwards double arrow cos A plus cos B plus cos C equals c o s 90 degree plus c o s 90 degree plus c o s 90 degree equals 0 plus 0 plus 0 equals 0

Answered by Vimala Ramamurthy | 20th Oct, 2015, 03:17: PM