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].
