>>12
So why are you trying to make it more complicated? Because of how common these angles are, you should know off the top of your head the sine and cosine of 0, 30, 45, 60, and 90. Hell, you could have it as 1+cos(2*x-90) or 1+cos(2*x)/(tan(2*x)^-1). Using that identity can be really useful if you don't know x; especially when you are taking a directive or integral. But when you know the angle, especially when it is one of the 5 common angles there is no reason to make it more complicated.