### Question Asked by a Student from EXXAMM.com Team

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 :
JEE 2007
A

pi/3

B

pi/6

C

pi/4

D

pi/2

#### HINT

We know that : l^2+m^2+n^2=1 here, l=cos(pi/4), m=cos(pi/4) and n is unknown.

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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