Graphical Analysis  Use a graphing utility to graph the function. Use the graph to determi...

Graphical Analysis  Use a graphing utility to graph the function. Use the graph to determine the behavior of the function as x → c.

(a) As x → 0+, the value of

(b) As x → 0−, the value of

(c) As x → π+, the value of

(d) As x → π−, the value of

f(x) = cot x