Cotangent of Three Right Angles less Angle

Theorem

 * $\cot \left({\dfrac {3 \pi} 2 - \theta}\right) = \tan \theta$

where $\cot$ and $\tan$ are cotangent and tangent respectively.

Also see

 * Sine of Three Right Angles less Angle
 * Cosine of Three Right Angles less Angle
 * Tangent of Three Right Angles less Angle
 * Secant of Three Right Angles less Angle
 * Cosecant of Three Right Angles less Angle