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Calculate the hyperbolic tangent
#include <math.h>
double tanh( double x );
float tanhf( float x );
- x
- The angle, in radians, for which you want to compute the hyperbolic
tangent.
libm
Use the -l m option to
qcc
to link against this library.
These functions compute the hyperbolic tangent (specified in radians) of x.
When the x argument is large, partial or total loss of significance
may occur.
The hyperbolic tangent value.
|
If an error occurs, these functions return 0, but this is also a valid
mathematical result.
If you want to check for errors, set
errno
to 0, call the function, and then check errno again.
These functions don't change errno if no errors occurred. |
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main( void )
{
printf( "%f\n", tanh(.5) );
return EXIT_SUCCESS;
}
produces the output:
0.462117
ANSI,
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
cosh(),
errno,
sinh()
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