Originally shared by Shreyas Joshi
Another way of looking at sine and cosine functions.
You make your way around the circle (black). As you do so, the values of Y translates to sine (red line) and the values of X translate to cosine (blue line)
Read more: http://www.businessinsider.com/7-gifs-trigonometry-sine-cosine-2013-5#ixzz2tBnCk7uc
