A vector makes angle with X,Y and Z axes that are in the ratio 1:2:1 respectively. The angle made by the vector with Y-axis is

A vector makes angle with X,Y and Z axes that are in the ratio 1:2:1 r

1.	A vector makes angle with X,Y and Z axes that are in the ratio 1:2:1 respectively. The angle made by the vector with Y-axis is
Answer» `pi//3` `pi//4` `pi//6` `pi//2` ANSWER :D