What does the triangle mean in physics?

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

The substances that are necessary for producing of certain hormones and that store and transport vitamins