Sines and Cosines

Sines and Cosines can be described simply with the acronym SOH-CAH-TOA. This means that the Sine of an angle within a triangle is the Opposite side length divided by the Hypotenuse of the triangle. For Cosine it means the Adjacent side of the angle divided by the Hypotenuse. Sines and cosines are used as trigonometric functions to display a ratio of the side lengths. One usage of these are for the discovering of certain unknown side lengths or angle lengths. With the use of a unit circle it is easy to see the sines and cosines of different triangle length. Unit circle is shown in image