# asin, asinh

## Purpose

Inverse sine and inverse hyperbolic sine.

## Synopsis

    Y = asin(X)
    Y = asinh(X)

## Description

`asin` and `asinh` operate element-wise on matrices. Their domains and ranges include complex values. All angles are measured in radians.

`asin(X)` returns the inverse sine for each element of `X`. For real elements of `X` in the range [-1,1], `asin(X)` is in the range [-`pi`/2,`pi`/2]. For real elements of `X` outside the range [-1,1], `asin(X)` has nonzero imaginary parts.

`asinh(X)` returns the inverse hyperbolic sine for each element of `X`.

## Examples

Graph the inverse sine function for the range `-1 <= x <= 1`.

    x = -1:.05:1;
    plot(x, asin(x))

## Algorithm

## See Also

    atan2, cos, exp, funm, log, sin, sqrt, tan

(c) Copyright 1994 by The MathWorks, Inc.