Question

cot(theta) is undefined for theta =
[check all that apply]

A) 0
B) pi/2
C) 3pi/2
D) pi

Answer 1

You'd do well to remember that
\[\large \cot\theta = \frac{\cos\theta}{\sin\theta}\]

your best bet is finding values of theta for which \(\Large \sin\theta = 0\)

Answer 2

\[\cot \theta=\frac{ \cos \theta }{ \sin \theta } \]
\[It is undefined for which \sin \theta=0,i.e.,\theta=n \pi,where n is an integer.\]