I have the values of Sin, Cos and Tan values of general angles (0,30,45,60,90,120,135,150,180,210.... up till 360)

I know how to get the values of Sin, Cos and Tan until 90 degrees. It'd be easier for me to know how to get the value of these instead of memorizing the huge table. I cant find anything on this except on Wikipedia, but the methods are too complex for my knowledge.

This is in my AS Pure Maths syllabus Edexcel(british examination board)

Any help will be appreciated