Trig is so shit. Half yearlie I topped my class, 2nd in the year. Trig only test, 2nd last in class, 14th in year. Yearlie test, topped my class and the year... HMM
you use it when you have the length of the adjacent and the hypotenuse sides and you use it to figure out the angle of the intersecting angle of the adjacent and hypotenuse when you have a right angle triangle. edit: I think, it's been a while.