September 16, 2015
frankensine(θ): an unholy combination of trig functions stitched into a horrifying whole http://mathwithbaddrawings.com/2015/09/16/13-trig-functions-you-need-to-memorize-right-now/ https://mathwithbaddrawings.files.wordpress.com/2015/09/20150915174113_00010.jpg
