If a line makes angles 60°, 135°, and 45° with X, Y and Z-axes respectively, then it's direction cosines will be-
Answer & explanation
Correct answer: option 3
Let the direction cosines of the lines be l, m, n. Then l= cos(60°)=1/2 , m= cos(135°)= -1/√2, n = cos(45°) = 1/√2