Easy way of memorizing values of sine, cosine, and tangent My math professor recently told us that she wanted us to be able to answer $\sin\left(\frac{\pi }{2}\right)$ in our head on the snap. I know I can simply memorize the table for the test by this Friday, but I may likely forget them after the test. So is there a trick or pattern you guys usually use to remember it? For example, SOHCAHTOA tells us what sine, cosine, and tangent really mean.

If not, I will just memorize the table. But just wanted to know what memorization techniques you guys use. I feel this is the perfect place to ask, because I bet a bunch of people in the math stackexchange, also had to go through the same thing freshman year of college.
Oh here is a picture of the unit circle:


1) Know "Sine of Sixty is Square root of 3 over 2" - notice the alliteration
2) Know Sqrt 3/2  is always paired with 1/2
3) Know Sin and Cos of 45 (Pi/4) is Sqrt 2/2
Two other things that shouldn't have to be memorized:
4) Know The ordered pair (Cos,Sin), like (x, y) is in alphabetical order
5) Know Where x and y are positive and negative
I just came up with this, it's not too bad!
