If + + =2 , then the system of equations x + (cos ) y + (cos ) z = 0, (cos ) x + y + (cos ) z = 0, (cos ) x +...

Question

If + + =2 , then the system of equations x + (cos ) y + (cos ) z = 0, (cos ) x + y + (cos ) z = 0, (cos ) x + (cos ) y + z = 0 has :

Accepted Answer

(B)

JEE Main 2021 Mathematics question