How does your calculator evaluate the cosine function? Here are some different methods for evaluating trig functions.

Sine, cosine and tangent are the principle trigonometric functions. (Image credit: YuryZap | Shutterstock ) ...

In high school, you probably learned that trigonometric functions – like sine, cosine and tangent –can be derived, geometrically, from a circle (hence why trig functions are also known as ...