# tan, tanh

## Purpose

Tangent and hyperbolic tangent.

## Synopsis

    Y = tan(X)
    Y = tanh(X)

## Description

The trigonometric functions operate element-wise on matrices. Their domains and ranges include complex values. All angles are measured in radians.

`tan(X)` is the circular tangent of each element of `X`.

`tanh(X)` is the hyperbolic tangent of each element of `X`.

## Examples

`tan(pi/2)= 1.6332e+16` is not infinite, but rather a value the size of the reciprocal of the floating-point accuracy `eps`, because `pi` is only a floating-point approximation to the exact value.

## Algorithm

## See Also

    acos, asin, atan, cos, exp, expm, funm, sin

(c) Copyright 1994 by The MathWorks, Inc.