Question

How do you graph `-2 tan^(-1) (x/2)`?

Answer 1

`y = - 2 tan ( x/2 ), x/2 ne ( 2 k + 1 ) pi/2`

`rArr` asymptotic`x ne ( 2 k + 1 ) pi,`

`k = 0, +-1, +-2, +-3, ...`

Period`= pi/(1/2) = 2pi`

See graph:
graph{(y+2 tan ( x/2 ))(x-pi +.01y)(x+pi +.01y)=0[-20 20 -10 10]}