PHP Tutorial - 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
| Parameter | Description |
|---|---|
| number | Required. 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 Value | The tangent of number |
| Return Type | Float |
Example
Return the tangent of different numbers
<?php//from w w w .j a v a2 s .c o 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.
