If cos A + cos B + cos C = 3, then what is the value of sin A + sin B + sin C?
Answer & explanation
Correct answer: option 3
We are given that :-
cos A + cos B + cos C = 3
Let us assume that ,
cos A = cos B = cos C = 1
It is possible if and only if
A = B = C = 0º { cos 0º = 1 }
Now,
sinA + sinB + sinC
= sin0º + sin0º + sin0º
= 0 + 0 + 0
= 0