## Trigonometry (11th Edition) Clone

$B$
The cotangent and cosecant functions are not defined for the following angles (or values of s): $0, \pi, 2\pi, 3\pi, 4\pi, ...$ Notice that the coefficients of $\pi$ is are whole numbers. Thus, the domain of the cotangent and cosecant functions is: $\left\{s|s\ne n\pi, \text{ where n is any integer}\right\}$