PHP tan() Function

Definition

Calculates the tangent value of the number provided as its only parameter.

Syntax

PHP tan() Function has the following syntax.

float tan ( float num )

Parameter

ParameterDescription
numberRequired. Specifies a value in radians

The parameter should be passed as radians. We should use deg2rad() to convert degrees to radians.

Return

Item Value
Return ValueThe tangent of number
Return TypeFloat

Example

Return the tangent of different numbers


<?php//from  w  w  w  .  j a v  a  2s .co m

$tan1 = tan(10); 
print($tan1);
print "\n";
$tan2 = tan(deg2rad(80));
print($tan2);
print "\n";

echo(tan(M_PI_4) . "\n");
echo(tan(0.50) . "\n");
echo(tan(-0.50) . "\n");
echo(tan(5) . "\n");
echo(tan(1) . "\n");
echo(tan(-5) . "\n");
echo(tan(-1));
?>

The code above generates the following result.





















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