A projectile has vx = 20 m/s and vy = 10 m/s. What will be the angle made by the velocity of the body with the vertical.
(a) tan⁻¹ (2.0)
(b) tan⁻¹ (1.5)
(c) tan⁻¹ (1.0)
(d) tan⁻¹ (0.5)