if a line makes angles of 90 ,135 and 45 with the x,y and z axes respectively,then its direction cosines are

These are the options for the Question: if a line makes angles of 90 ,135 and 45 with the x,y and z axes respectively,then its direction cosines are

(a) 0,-1/[2,1/[2
(b) -1/[2,0,1/[2
(c) 1/[2,0,-1/[2
(d) 0,1/[2,1/[2

The correct answer is – Hence, the correct option is (a) 0, -1/[2√2], 1/[2√2].