A projectile is fired horizontally with a velocity of 98 m/s from the top of a hill 490 m high. Find the angle that the line joining the top of the hill and the point on the ground where the projectile hits make with the vertical.(Take g=9.8 ms⁻²)
A. tan⁻¹(1/2)
B. tan⁻¹(2)
C. tan⁻¹(1/3)
D. tan⁻¹(3)