double tan ( double x );
float tan ( float x );
long double tan ( long double x ); |
<cmath> |
Compute tangent
Returns the tangent of an angle of x radians.
Parameters
- x
- Floating point value representing an angle expressed in radians.
Return Value
Tangent of
x.
Portability
In C, only the
double version of this function exists with this name.
Example
/* tan example */
#include <stdio.h>
#include <math.h>
#define PI 3.14159265
int main ()
{
double param, result;
param = 45.0;
result = tan (param*PI/180);
printf ("The tangent of %lf degrees is %lf.\n", param, result );
return 0;
}
|
Output:
The tangent of 45.000000 degrees is 1.000000.
|
See also
| sin | Compute sine (function) |
| cos | Compute cosine (function) |
| atan | Compute arc tangent (function) |
