PHP asin() Function

The asin() function is predefined trigonometry PHP function. It is used to calculate the trigonometry problems. It returns arc sine of a number between -1 and 1.

Syntax:

Parameter	Description	Required/Optional
number	Specify a number between -1 to 1	Required

Note: asin(1) returns the value of Pi/2.

Example1

<?php
$num=0 ;
echo "Your number is : ".$num;
echo "<br>"."By using 'asin()' function your number is :".(asin($num));
?>

Output:

Your number is : 0
By using 'asin()' function your number is :0

Example2

<?php
$num=1;
echo "Your number is : ".$num;
echo "<br>"."By using 'asin()' function your number is :".(asin($num));
?>

Output:

Your number is : 1
By using 'asin()' function your number is :1.5707963267949

Example3

<?php
$num=-1;
echo "Your number is : ".$num;
echo "<br>"."By using 'asin()' function your number is :".(asin($num));
?>

Output:

Your number is : -1
By using 'asin()' function your number is :-1.5707963267949

Example4

<?php
$num=(-0.4);
echo "Your number is : ".$num;
echo "<br>"."By using 'asin()' function your number is :".(asin($num));
?>

Output:

Your number is : -0.4
By using 'asin()' function your number is :-0.41151684606749

Example5

<?php
$num=(0.64);
echo "Your number is : ".$num;
echo "<br>"."By using 'asin()' function your number is :".(asin($num));
?>

Output:

Your number is : 0.64
By using 'asin()' function your number is :0.69449826562656

Example6

<?php
$num=2;
echo "Your number is : ".$num;
echo "<br>"."By using 'asin()' function your number is :".(asin($num));
?>

Output:

Your number is : 2
By using 'asin()' function your number is :NAN

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PHP asin() Function

Syntax:

Note: asin(1) returns the value of Pi/2.

Example1

Example2

Example3

Example4

Example5

Example6

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