# Acosh

Computes inverse hyperbolic cosine (nonnegative) of vector elements.

## Syntax

Fortran:

call vsacosh( n, a, y )

call vdacosh( n, a, y )

call vcacosh( n, a, y )

call vzacosh( n, a, y )

C:

vsAcosh( n, a, y );

vdAcosh( n, a, y );

vcAcosh( n, a, y );

vzAcosh( n, a, y );

## Input Parameters

Name | Type | Description
--- | --- | ---
n | FORTRAN: INTEGER, INTENT(IN) C: int | Specifies the number of elements to be calculated.
a | FORTRAN: REAL, INTENT(IN) for vsacosh DOUBLE PRECISION, INTENT(IN) for vdacosh COMPLEX, INTENT(IN) for vcacosh DOUBLE COMPLEX, INTENT(IN) for vzacosh C: const float* for vsAcosh const double* for vdAcosh const MKL_Complex8* for vcAcosh const MKL_Complex16* for vzAcosh | FORTRAN: Array, specifies the input vector a. C: Pointer to an array that contains the input vector a.

## Output Parameters

Name | Type | Description
--- | --- | ---
y | FORTRAN: REAL for vsacosh DOUBLE PRECISION for vdacosh COMPLEX for vcacosh DOUBLE COMPLEX for vzacosh C: float* for vsAcosh double* for vdAcosh MKL_Complex8* for vcAcosh MKL_Complex16* for vzAcosh | FORTRAN: Array, specifies the output vector y. C: Pointer to an array that contains the output vector y.

Parent topic: Hyperbolic Functions