Derivative of Hyperbolic Secant Function

Theorem

 * $\map {\dfrac \d {\d z} } {\sech z} = -\sech z \ \tanh z$

where $\tanh$ is the hyperbolic tangent and $\sech$ is the hyperbolic secant.

Also see

 * Derivative of Hyperbolic Sine Function
 * Derivative of Hyperbolic Cosine Function


 * Derivative of Hyperbolic Tangent Function
 * Derivative of Hyperbolic Cotangent Function


 * Derivative of Hyperbolic Cosecant Function