PHP cos() Function
Definition
cos() calculates the cosine value.
Syntax
PHP cos() Function has the following format.
float cos ( float num ) Parameter
| Parameter | Is Required | Description |
|---|---|---|
| number | Required. | A number |
The parameter should be passed as radians. We should use deg2rad() to convert degrees to radians.
Return
| Item | Description |
|---|---|
| Return Value | The cosine of number |
| Return Type | Float |
The cos() function returns a numeric value between -1 and 1, which represents the cosine of the angle.
Example
Return the cosine of different numbers:
<?php//from ww w . j a v a2 s . c o m
$cos1 = cos(10);
print($cos1);
echo("\n");
$cos2 = cos(deg2rad(80));
print($cos1);
echo("\n");
echo(cos(3) . "\n");
echo(cos(-3) . "\n");
echo(cos(0) . "\n");
echo(cos(M_PI) . "\n");
echo(cos(2*M_PI));
?>
The code above generates the following result.
