COT

Purpose:

Calculates the cotangent of any expression.

COT(val)

val

A scalar, series or table.

A scalar, series, or table.

cot(-2*pi..pi/100..2*pi);gridhv;griddot;sety(-10,10)

$image\cotpic01.gif$

displays the cotangent from -2π to 2π.

cot(pi/4)

returns 1.

cot(-2..0.1..2)

returns a 41 point series.

The cotangent is defined as:

$image\cot01.gif$

for all complex z.

$image\cot02.gif$

The function calculates in radians unless degrees are specified with the SETDEGREE function.

At or near Nπ radians, or for 180N degrees, where N is any integer, this function returns very large results or math errors.