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C Library Functions  - cosh (3)

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NAME

COSH(3) - [MATHEMATICS:TRIGONOMETRIC] Hyperbolic cosine function

SYNOPSIS

result = cosh(x)

         elemental TYPE(kind=KIND) function cosh(x)

          TYPE(kind=KIND),intent(in) :: x

CHARACTERISTICS

o	TYPE may be real or complex of any kind.
o	The returned value will be of the same type and kind as the argument.

DESCRIPTION

COSH(3) computes the hyperbolic cosine of X.

If X is of type complex its imaginary part is regarded as a value in radians.

OPTIONS

o	X : the value to compute the hyperbolic cosine of

RESULT

If X is complex, the imaginary part of the result is in radians.

If X is real, the return value has a lower bound of one, COSH(X) >= 1.

EXAMPLES

Sample program:

    program demo_cosh
    use, intrinsic :: iso_fortran_env, only : &
     & real_kinds, real32, real64, real128
    implicit none
    real(kind=real64) :: x = 1.0_real64
        write(*,*)’X=’,x,’COSH(X=)’,cosh(x)
    end program demo_cosh

Results:

     >  X=   1.00000000000000      COSH(X=)   1.54308063481524

STANDARD

FORTRAN 77 , for a complex argument - Fortran 2008

SEE ALSO

Inverse function: ACOSH(3)

RESOURCES

o	Wikipedia:hyperbolic functions

fortran-lang intrinsic descriptions

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Nemo Release 3.1

cosh (3)

July 22, 2023

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