about to cry. extra points given!!!

I don't understand how to do this. i can do Sine, Cosine, and Tangent when it is rational numbers, but i don't know how to do this. Please help!! DO NOT POST ANY SITES!!!!!!!! i also will give brainly to the answer that helps me the most.

about to cry extra points given I dont understand how to do this i can do Sine Cosine and Tangent when it is rational numbers but i dont know how to do this Ple class=