Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
tan, tanf, tanh, tanhf
div
eof
Collapse the table of content
Expand the table of content

tan, tanf, tanh, tanhf

Calculate the tangent (tan or tanf) or hyperbolic tangent (tanh or tanhf).

double tan(
   double x 
);
float tan(
   float x 
);  // C++ only
long double tan(
   long double x
);  // C++ only
float tanf(
   float x 
);
double tanh(
   double x 
);
float tanh(
   float x 
);  // C++ only
long double tanh(
   long double x
);  // C++ only
float tanhf(
   float x 
);

x

Angle in radians.

tan returns the tangent of x. If x is greater than or equal to 263, or less than or equal to –263, a loss of significance in the result occurs.

Input

SEH Exception

Matherr Exception

± QNAN,IND

none

_DOMAIN

± ∞ (tan, tanf)

INVALID

_DOMAIN

tanh returns the hyperbolic tangent of x. There is no error return.

C++ allows overloading, so users can call overloads of tan and tanh that take float or long double types. In a C program, the tan and tanh functions always take and return double.

Routine

Required header

tan, tanf, tanh, tanhf

<math.h>

For additional compatibility information, see Compatibility in the Introduction.

// crt_tan.c
// This program displays the tangent of pi / 4
// and the hyperbolic tangent of the result.
//

#include <math.h>
#include <stdio.h>

int main( void )
{
   double pi = 3.1415926535;
   double x, y;

   x = tan( pi / 4 );
   y = tanh( x );
   printf( "tan( %f ) = %f\n", pi/4, x );
   printf( "tanh( %f ) = %f\n", x, y );
}
tan( 0.785398 ) = 1.000000 tanh( 1.000000 ) = 0.761594

Community Additions

ADD
Show:
© 2015 Microsoft