COSH — Hyperbolic cosine function¶

COSH(X)¶

COSH(X) computes the hyperbolic cosine of X.

Parameters: X – The type shall be REAL or COMPLEX.
Returns: 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.

Standard:: Fortran 77 and later, for a complex argument Fortran 2008 or later
Class:: Elemental function

Syntax:

X = COSH(X)

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