PHP sin() Function
Definition and Usage
The sin() function returns the sine of a number.
Syntax
sin(x)
| Parameter | Description |
|---|---|
| x | Required. A number. |
Description
The sin() function returns a parameter x sine value. x The unit is radians.
Tips and Comments
Note:The value returned by the sin() function is between -1 and 1.
Example
In this example, we will calculate the sine of different values:
<?php echo(sin(3)); echo(sin(-3)); echo(sin(0)); echo(sin(M_PI)); echo(sin(M_PI_2)) ?>
Output:
0.14112000806 -0.14112000806 0 1.22460635382E-016 1
