Yes, I am aware that the angle is theta. There is no other information provided, You must deduce the angle from ONLY those three variables - Vo is 141 m/s. Final y position I assume is 40 meters and the x distance is 1500 meters. I've taken the derivative for time to be t = X / (Vo) (Cos)...
Homework Statement
A patrol boat off a coast is ordered to destroy a rocket launcher that sits on the roof of 40-meter tall building. The horizontal distance between the boat and the rocket launcher is 1500 meters. The muzzle velocity of the patrol boat’s stabilized 30-mm cannon is 141...