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# tan

From cppreference.com
< c‎ | numeric‎ | math

Defined in header `<math.h>` |  |
float tanf( float arg ); |  | (since C99)
double tan( double arg ); |  |
long double tanl( long double arg ); |  | (since C99)

Computes tangent of `arg`

### [edit] Parameters

arg | - | floating point value representing angle in radians

### [edit] Return value

Tangent of `arg`.

Domain error occurs if `arg` is infinite. NAN is returned in that case.

### [edit] See also

sin | computes sine (sin(x)) (function) [edit]
cos | computes cosine (cos(x)) (function) [edit]
atan | computes arc tangent (arctan(x)) (function) [edit]
C++ documentation for tan

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