Question

How do you find the exact values of `costheta` and `tantheta` when `sintheta=1`?

Answer 1

`sin theta =1 to theta = (2k+1/2)pi, k = 0, +-1, +-2, +-3, ...`,

common to `Q_1 and Q_2`. Here, `cos theta = 0 and tan theta` has

infinite discontinuity. The left limit is `-oo` and the right limit is

`oo`.