Geometry & Trigonometry
Intermediate

Cotangent Identity

Cotangent as the ratio of cosine to sine.

Formula

cot⁡θ=cos⁡θsin⁡θ\cot\theta = \frac{\cos\theta}{\sin\theta}

Variables

\thetaAngle

Example

cot 45° = cos45°/sin45° = 1.

Did You Know?

Cotangent is the reciprocal of tangent — cosine over sine.

trigonometryidentitycotangent