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# asech

Inverse hyperbolic secant

Y = asech(X)

## Description

Y = asech(X) returns the inverse hyperbolic secant for each element of X.

The asech function operates element-wise on arrays. The function's domains and ranges include complex values. All angles are in radians.

## Examples

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### Graph of Inverse Hyperbolic Secant Function

Graph the inverse hyperbolic secant over the domain .

```x = 0.01:0.001:1;
plot(x,asech(x)), grid on
```

${\text{sech}}^{-1}\left(z\right)={\mathrm{cosh}}^{-1}\left(\frac{1}{z}\right).$