COS

Purpose:

Calculates the cosine of any expression.

COS(val)

val

A scalar, series or table.

A scalar, series, or table.

cos(-2*pi..pi/100..2*pi);gridhv;griddot

$image\cospic01.gif$

displays the cosine from -2π to 2π.

cos(pi)

returns -1.

cos(-2..0.1..2)

returns a 41 point series.

t = 0..0.01..1

cos(2*pi*10*t)

returns a 101 point series of a 10 Hertz cosine sampled at 100 samples per second. This is equivalent to:

gcos(101, 0.01, 10)

The cosine is defined as:

$image\cos01.gif$

for all complex z.

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