asin() function in PHP

Thisasin()The function returns the inverse sine of a number. It specifies-1to1range, then it returns NaN.-1to1If the number is not within the range, it returns NaN.

Body

Syntax

asin(num)

• parameter-num-1to1number. The number to return the inverse sine of. The range is specified by

Returns

Thisasin()The function returns the inverse sine of a number. It specifies-1to1range, then it returns NaN.-1to1If the number is not within the range, it returns NaN.

Example

<?php
　　　echo(asin(0.50)  .  "<br>");
　　　echo(asin(-0.90)  .  "<br>");
?>

Output Result

0.5235987755983<br>-1.1197695149986<br>

Let's see another example-

Example

<?php
　　　echo(asin(0)  .  "<br>");
　　　echo(asin(1)  .  "<br>");
　　　echo(asin(-1)  .  "<br>");
　　　echo(asin(2)  .  "<br>");
?>

Output Result

0<br>1.5707963267949<br>-1.5707963267949<br>NAN<br>