| Name | Description | Notes | Source | Availability | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
atan() |
Compute arc tangent | M | (·) | <tgmath.h> |
C99 | C11 | |||||
atan() |
Compute arc tangent | (·) | <math.h> |
C89 | C90 | C95 | C99 | C11 | |||
atanf() |
Compute arc tangent | (·) | <math.h> |
C99 | C11 | ||||||
atanl() |
Compute arc tangent | (·) | <math.h> |
C99 | C11 | ||||||
catan() |
Compute arc tangent | ? | (·) | <complex.h> |
C99 | C11 | |||||
catanf() |
Compute arc tangent | ? | (·) | <complex.h> |
C99 | C11 | |||||
catanl() |
Compute arc tangent | ? | (·) | <complex.h> |
C99 | C11 | |||||
ctan() |
Compute tangent | ? | (·) | <complex.h> |
C99 | C11 | |||||
ctanf() |
Compute tangent | ? | (·) | <complex.h> |
C99 | C11 | |||||
ctanl() |
Compute tangent | ? | (·) | <complex.h> |
C99 | C11 | |||||
tan() |
Compute tangent | M | (·) | <tgmath.h> |
C99 | C11 | |||||
tan() |
Compute tangent | (·) | <math.h> |
C89 | C90 | C95 | C99 | C11 | |||
tanf() |
Compute tangent | (·) | <math.h> |
C99 | C11 | ||||||
tanl() |
Compute tangent | (·) | <math.h> |
C99 | C11 | ||||||
The ranges are probably wrong for hyperbolics.
[: More
must be said here about the complex functions'
ranges.]
#include <math.h>
float tanf(float a);
double tan(double a);
long double tanl(long double a);
#include <complex.h>
float complex ctanf(float complex a);
double complex ctan(double complex a);
long double complex ctanl(long double complex a);
#include <tgmath.h>
floating-type tan(floating-type a);
The tan
functions take an angle a in radians,
and return the tangent of that angle, tan a.
#include <math.h>
float atanf(float r);
double atan(double r);
long double atanl(long double r);
#include <complex.h>
float complex catanf(float complex r);
double complex catan(double complex r);
long double complex catanl(long double complex r);
#include <tgmath.h>
floating-type atan(floating-type r);
The atan
functions take a ratio r and return
the arc tangent of that ratio, tan−1 r,
in the range [−½π, +½π].
