Graph the Function $\mathrm { f } ( \mathrm { x } ) = - \tan \mathrm { x }$

Essay

Graph the function $\mathrm { f } ( \mathrm { x } ) = - \tan \mathrm { x }$ on the interval $\left( - \frac { \pi } { 2 } , \frac { 3 \pi } { 2 } \right)$ . Explain why it is correct to say that $\mathrm { f }$ is decreasing on the interval $\left( \frac { \pi } { 2 } , \frac { 3 \pi } { 2 } \right)$ , but it is incorrect to say that $\mathrm { f }$ is decreasing on the interval $\left( - \frac { \pi } { 2 } , \frac { 3 \pi } { 2 } \right)$ .