How do you graph y=-cot(4x)?

1 Answer
Sep 16, 2016

A short Table for y = -cot 4x for one period #x in (0^o, 45^o):.

(x, y): (0, -oo) (15^o, -sqrt 3) (22.5^o, 0) (30^o, sqrt 3) (55^o, oo),

Explanation:

tan theta is periodic with period pi. So,

tan 4x is periodic with perid pi/4

Note infinite discontinuity at x = 0 and x = pi/4=45^o.

Make a graph for one period, x in (0, pi/4)=(0^o, 45^o) and move it

laterally on either side, successively, on either side, to get the graph

on both left and right sides.

A short Table for y = -cot 4x follows..

(x, y): (0, -oo) (15^o, -sqrt 3) (22.5^o, 0) (30^o, sqrt 3) (55^o, oo),

Now, you can make your graph, with hand or using an

electronic graphic device.

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