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<h1 class="declaration">function asin</h1>
<p>
<img src="asin.png" align="right">
Returns the arcus sine of its argument, which can be either real, complex or a matrix. The returned value's type is changed to complex if necessary (when the absolute value of the argument is greater than 1). By default, the returned value is in radians. This can be changed by specifying the switch /deg.
<br><br><b><font size=+2>Syntax</font></b><br>
<i>result</i> = asin(X [, /deg])
<br><br><b><font size=+2>Arguments</font></b><br>
<table CELLSPACING=0 CELLPADDING=0>
<tr VALIGN=TOP><td nowrap>X: </td>
<td> a number (integer, real, complex) or a matrix, specifying the sine of the angle to be returned. If X is a matrix, a matrix of the same size is returned where each element represents the result of the operation.</td></tr>
</table>
<br><br><b><font size=+2>Switches</font></b><br>
<table CELLSPACING=0 CELLPADDING=0>
<tr VALIGN=TOP><td nowrap>/deg: </td>
<td> The result will be in degrees</td></tr>
</table>
<br><br><b><font size=+2>Examples</font></b><br>
To find the angle (in degrees) whose sine is 0.5, type:
<br><tt> print asin(0.5, /deg)</tt>
<br><br><b><font size=+2>See also</font></b><br>
<a href = "function_acos.html">function acos</a><br>
<a href = "function_atan.html">function atan</a><br>
<a href = "category.html#trigonometry">category index: trigonometry</a><br>
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