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PHP deg2rad() Function

In this chapter you will learn:

  1. Definition for PHP deg2rad() Function
  2. Syntax for PHP deg2rad() Function
  3. Parameter for PHP deg2rad() Function
  4. Return for PHP deg2rad() Function
  5. Note for PHP deg2rad() Function
  6. Example - converts degrees to radians

Definition

The deg2rad() function converts degrees to radians.

Syntax

PHP deg2rad() Function has the following format.

float deg2rad ( float num )

Parameter

Parameter Is RequiredDescription
num Required. Degree to convert

Return

Item Description
Return ValueThe radian equivalent of number
Return TypeFloat

Note

To convert a radian value to a degree value, look at the rad2deg() function.

Example

Radians are calculated as being $degrees multiplied by the mathematical constant pi, then divided by 180. 


/*from j  a  v  a 2 s .c om*/
<?php
echo deg2rad("45") . "\n";
echo deg2rad("90") . "\n";
echo deg2rad("360"). "\n";

$deg = 180;
$rad = deg2rad($deg);
echo "$deg degrees is equal to $rad radians.\n";


$sin1 = sin(deg2rad(80)); 
print $sin1;
?>

The code above generates the following result.

Next chapter...

What you will learn in the next chapter:

  1. Definition for PHP exp() Function
  2. Syntax for PHP exp() Function
  3. Parameter for PHP exp() Function
  4. Return for PHP exp() Function
  5. Example - Return 'e' raised to the power of different numbers
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