trigonometry - Trouble visualizing sin and cos - Mathematics Stack

I'm working on building tetris now in Java and am at the point of rotations I originally hardcoded all of the rotations, but found that linear algebra was the better way to go. I'm trying to u

Math trigonometry-notes

Trigonometry: Tips and Tricks: Learning the Unit Circle

HP Prime Math Applications

Tutorials - Trigonometry - Garry's Mod Wiki

RPubs

WPS - Mathematics Curriculum by Waterford Public Schools - Issuu

JavaScript Game Dev Tutorial – Build Gorillas with HTML Canvas + JavaScript

Geometry and Trigonometry - SusanLeeSensei

Why do the sine and cosine functions appear in areas of math and physics that have nothing to do with triangles? - Quora