Question

If sinθ1 + sinθ2 + sinθ3 = 3, then cosθ1 + cosθ2 + cosθ3 =

Answer 1

Answer:

sin theta1 + sin theta2 + sin theta3 =3

It is only possible when,

sin theta1 = sin theta2 = sin theta3 =1

[Since sin has maximum value of 1]

Therefore, theta1=theta2=theta3=π/2

So,

cos π/2+cos π/2+cos π/2=0

Hope it helps you.