If a line makes an angle of pi/4 with...

If a line makes an angle of `pi/4` with the positive directions of each of x-axis and y-axis, then the angle that the line makes with the positive direction of the z-axis is (1) `pi/6` (2) `pi/3` (3) `pi/4` (4) `pi/2`

`pi//6`

`pi//3`

`pi//4`

`pi//2`

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