COTH

Purpose:

Returns the hyperbolic cotangent of any expression.

COTH(val)

val

A scalar, series or table.

A scalar, series, or table.

coth(-5..0.01..5);gridhv;griddot;sety(-4,4);setytic(1)

$image\cothpic01.gif$

displays the hyperbolic cotangent from –5 to 5.

coth(pi)

returns 1.0037419.

coth(-2..0.1..2)

returns a 41 point series.

The hyperbolic cotangent is defined as:

$image\coth01.gif$

for all complex z.

$image\coth02.gif$

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

At 0, this function returns a math error. Near 0, it returns very large results.