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Compute the inverse hyperbolic cosine
#include <math.h> double acosh( double x ); float acoshf( float x ); long double acoshl( long double x );
libm
Use the -l m option to qcc to link against this library.
These functions compute the inverse hyperbolic cosine (in radians) of x.
The inverse hyperbolic cosine (in radians) of x. For finite values of x < 1, these functions return NaN. The return value when x is -Inf is NaN.
#include <stdio.h> #include <math.h> #include <stdlib.h> int main( void ) { printf( "%f\n", acosh( 1.5 ) ); return EXIT_SUCCESS; }
produces the output:
0.962424
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | No |
Thread | Yes |
asinh(), atanh(), cosh(), errno
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