A rocket with a mass of 4.05x10^5 kg is in flight near Earth's surface. Its thrust is directed at an angle of 60.4 degrees above the horizontal and has a magnitude of 8.31x10^6 N. Find the magnitude of the rocket's thrust.

A) 8.31x10^6 N
B) 4.05x10^5 kg
C) 60.4 degrees
D) Earth's surface