Tangent of Three Right Angles less Angle

Theorem

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

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

Also see

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