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Q 1115223160.     If a line makes an angle of `pi/4` with the positive directions of each of `x`- axis and y- axis, then angle that the line makes with the positive direction of the `z`- axis is :
We know that :
here, `l=cos(pi/4), m=cos(pi/4)` and `n` is unknown.
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)