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8.55 COSH — Hyperbolic cosine function

Description:
COSH(X) computes the hyperbolic cosine of X.
Standard:
Fortran 77 and later, for a complex argument Fortran 2008 or later
Class:
Elemental function
Syntax:
X = COSH(X)
Arguments:

X The type shall be REAL or COMPLEX.

Return value:
The return value has same type and kind as X. 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) \geq 1.
Example:
          program test_cosh
            real(8) :: x = 1.0_8
            x = cosh(x)
          end program test_cosh
     

Specific names:

Name Argument Return type Standard
COSH(X) REAL(4) X REAL(4) Fortran 77 and later
DCOSH(X) REAL(8) X REAL(8) Fortran 77 and later

See also:
Inverse function: ACOSH