COSH

Purpose:

Calculates the hyperbolic cosine of any expression.

Syntax:

COSH(val)

val

-

A scalar, series or table.

Returns:

A scalar, series, or table.

Example:

cosh(-5..0.01..5);gridhv;griddot

 

 

image\coshpic01.gif

 

displays the hyperbolic cosine from 5 to 5.

Example:

cosh(pi)

 

returns 11.59195328.

Example:

cosh(ln(phi))

 

returns 1.118034 or 5 / 2

Example:

cosh(-2..0.1..2)

 

returns a 41 point series.

Remarks:

The hyperbolic cosine is defined as:

 

image\cosh01.gif

 

for all complex z.

 

SETDEGREE and SETRADIAN have no effect on this function because it always operates in radians.

See Also:

ACOS

ACOSH

COS

CSCH

GCOSH

TRIGONOMETRIC FUNCTIONS