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

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

There are three main trigonometric functions - Sine θ (sin θ), Cosine θ (cos θ) and Tangent θ (tan θ). Sin θ - Ratio of Perpendicular to Hypotenuse Cos θ - Ratio of Base to Hypotenuse ...