C in a Nutshell

Name

ctan

Synopsis

Calculates the tangent of a complex number

#include <complex.h>
double complexctan( double complex z );
float complex ctanf( float complex z );
long double complex ctanl( long double complex z );

The ctan() function returns the tangent of its complex number argument z, which is equal to sin(z) / cos(z).

Example

double complex z = − 0.53 + 0.62 * I;
double complex c, d;

c = ctan( z );
d = csin( z ) / ccos( z );

printf("The ctan() function returns %.2f %+.2f \xD7 I.\n",
       creal(c), cimag(c) );
printf("Using the csin() and ccos() functions yields %.2f %+.2f \xD7 I.\n",
       creal(d), cimag(d) );

This code produces the following output:

The ctan() function returns -0.37 +0.67 × I.
Using the csin() and ccos() functions yields -0.37 +0.67 × I.

See Also

csin(), ccos(), cacos(), casin(), catan()