asin

PHP 4, PHP 5, PHP 7, PHP 8
asin - Arc sine
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asin( float$num ): float

Returns the arc sine of num in radians. asin is the inverse function of sin, which means that a==sin(asin(a)) for every value of a that is within asin's range.

Parameters

num

The argument to process

Return Values

The arc sine of num in radians

Related Functions

  • acos - Arc cosine
  • asinh - Inverse hyperbolic sine
  • atan - Arc tangent
  • sin - Sine

Example of asin

Show all examples for asin

<?php
echo asin(0.64) . "\n";
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Function asin:

Mathematical Functions Functions

Most used PHP functions