This is a

graph of the

equation `y = cot x = 1/tan x`. There are

discontinuities at the points

`x = 0`,

`x=-π`, and

`x = π` for which

`y` is

undefined.

+-------------------------------------------------------------------------------------------------+
| # | # | 2.5000
| # | # | 2.3333
| # | # | 2.1666
| # | # | 2.0000
| # | # | 1.8333
| # | # | 1.6666
| # | # | 1.5000
| # | # | 1.3333
| # | # | 1.1666
| # | # | 1.0000
| ## | ## | .83333
| # | # | .66666
| ## | ## | .50000
| ### | ### | .33333
| ## | ## | .16666
|-----------------------###----------------------|----------------------###-----------------------| .00000
| ## | ## | -.1666
| ### | ### | -.3333
| ## | ## | -.5000
| # | # | -.6666
| ## | ## | -.8333
| # | # | -1.000
| # | # | -1.166
| # | # | -1.333
| # | # | -1.500
| # | # | -1.666
| # | # | -1.833
| # | # | -2.000
| # | # | -2.166
| # | # | -2.333
| # | # | -2.500
+-------------------------------------------------------------------------------------------------+
A A A A A
-π -π/2 0 π/2 π