A line making angles 45° and 60° with the positive directions of the axes of x and y makes with the positive direction of z-axis, an angle of
60°
120°
60° or 120°
None of these
The two curves y = 3 and y = 5 intersect at an angle
A.
Given curves y = 3x ...(i)
and y = 5x ...(ii)
Intersect at the point (0, 1).
Now, differentiating Eqs. (i) and (ii) w.r.t. x, we get