COSH

Purpose:

Calculates the hyperbolic cosine of any expression.

COSH(val)

val

A scalar, series or table.

A scalar, series, or table.

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

$image\coshpic01.gif$

displays the hyperbolic cosine from –5 to 5.

cosh(pi)

returns 11.59195328.

cosh(ln(phi))

returns 1.118034 or √5 / 2

cosh(-2..0.1..2)

returns a 41 point series.

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.