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function
<cmath> <ctgmath>

sin

```double sin(double x);
```
```     double sin  (double x);
float sinf (float x);
long double sinl (long double x);
```
```     double sin (double x);
float sin (float x);
long double sin (long double x);
```
```     double sin (double x);
float sin (float x);
long double sin (long double x);
double sin (T x);           // additional overloads for integral types```
Compute sine
Returns the sine of an angle of x radians.

Header <tgmath.h> provides a type-generic macro version of this function.
This function is overloaded in `<complex>` and `<valarray>` (see complex sin and valarray sin).
Additional overloads are provided in this header (`<cmath>`) for the integral types: These overloads effectively cast x to a `double` before calculations (defined for T being any integral type).

This function is also overloaded in `<complex>` and `<valarray>` (see complex sin and valarray sin).

Parameters

x
Value representing an angle expressed in radians.
One radian is equivalent to `180/PI` degrees.

Return Value

Sine of x radians.

Example

 ``1234567891011121314`` ``````/* sin example */ #include /* printf */ #include /* sin */ #define PI 3.14159265 int main () { double param, result; param = 30.0; result = sin (param*PI/180); printf ("The sine of %f degrees is %f.\n", param, result ); return 0; }``````

Output:
 ``` The sine of 30.000000 degrees is 0.500000. ```