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 ...

Sin, cos and tan are commonly used abbreviations for the three trigonometric functions sine, cosine and tangent.