ACOSH(3) BSD Library Functions Manual ACOSH(3)NAME
acosh -- inverse hyperbolic cosine function
SYNOPSIS
#include <math.h>
double
acosh(double x);
long double
acoshl(long double x);
float
acoshf(float x);
DESCRIPTION
The acosh() function computes the principle value of the inverse hyperbolic cosine of x. The result is in the range [0, +infinity].
SPECIAL VALUES acosh(1) returns +0.
acosh(x) returns a NAN and raises the "invalid" floating-point exception for x < 1.
acosh(+infinity) returns +infinity.
VECTOR OPERATIONS
If you need to apply the acosh() function to SIMD vectors or arrays, using the following functions provided by the Accelerate.framework may
give significantly better performance:
#include <Accelerate/Accelerate.h>
vFloat vacoshf(vFloat x);
void vvacoshf(float *y, const float *x, const int *n);
void vvacosh(double *y, const double *x, const int *n);
SEE ALSO asinh(3), atanh(3), exp(3), math(3)STANDARDS
The acosh() function conforms to ISO/IEC 9899:2011.
HISTORY
The acosh() and acoshf() function appeared in 4.3BSD.
4.3 Berkeley Distribution December 11, 2006 4.3 Berkeley Distribution
Check Out this Related Man Page
ACOSH(3) BSD Library Functions Manual ACOSH(3)NAME
acosh -- inverse hyperbolic cosine function
SYNOPSIS
#include <math.h>
double
acosh(double x);
long double
acoshl(long double x);
float
acoshf(float x);
DESCRIPTION
The acosh() function computes the principle value of the inverse hyperbolic cosine of x. The result is in the range [0, +infinity].
SPECIAL VALUES acosh(1) returns +0.
acosh(x) returns a NAN and raises the "invalid" floating-point exception for x < 1.
acosh(+infinity) returns +infinity.
VECTOR OPERATIONS
If you need to apply the acosh() function to SIMD vectors or arrays, using the following functions provided by the Accelerate.framework may
give significantly better performance:
#include <Accelerate/Accelerate.h>
vFloat vacoshf(vFloat x);
void vvacoshf(float *y, const float *x, const int *n);
void vvacosh(double *y, const double *x, const int *n);
SEE ALSO asinh(3), atanh(3), exp(3), math(3)STANDARDS
The acosh() function conforms to ISO/IEC 9899:2011.
HISTORY
The acosh() and acoshf() function appeared in 4.3BSD.
4.3 Berkeley Distribution December 11, 2006 4.3 Berkeley Distribution
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