Question

If a line makes angle π/3 and π/4 with x-axis and y-axis respectively, then the angle made by the line with z-axis

A. π/2

B. π/3

C. π/4

D. 5π/12

Answer 1

Correct answer is B.

If a line makes angles α , β and γ with the axes then,

cos²α + cos²β + cos²γ = 1 → (1)

Here,

Now,