# The Cos and Sin functions

The picture to the left is very important. You can read off the values of sin(x) = opposite side/hypothenuse, cos(x) = adjacent side/hypothenuse. as well as tan(x) = opposite side/adjacent side, which is the slope. |

The picture to the left is very important. You can read off the values of sin(x) = opposite side/hypothenuse, cos(x) = adjacent side/hypothenuse. as well as tan(x) = opposite side/adjacent side, which is the slope. |