Manual Reference Pages  - cosh (3fortran)

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 : 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 intrinsic descriptions

Nemo Release 3.1 cosh (3fortran) November 02, 2024
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