Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

ID 767251
Date 7/13/2023
Public

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Document Table of Contents

ACOSH

Elemental Intrinsic Function (Generic): Produces the hyperbolic arccosine of x.

result = ACOSH (x)

x

(Input) Must be of type real, where x must be greater than or equal to 1, or of type complex.

Results

The result type and kind are the same as x.

If the result is complex, the real part is non-negative, and the imaginary part is expressed in radians and lies in the range -pi <= AIMAG (ACOSH (x)) <= pi.

Specific Name

Argument Type

Result Type

ACOSH 1

REAL(4)

REAL(4)

DACOSH 1

REAL(8)

REAL(8)

QACOSH

REAL(16)

REAL(16)

1The setting of compiler options specifying real size can affect ACOSH and DACOSH.

Example

ACOSH (1.0) has the value 0.0.

ACOSH (180.0) has the value 5.8861.