Cscx Behavior
1. **State the problem:** We need to graph the function $f(x) = \csc x$ and discuss its behavior near $x=0$.
2. **Recall the definition:** The cosecant function is defined as $\csc x = \frac{1}{\sin x}$.
3. **Important rules:**
- $\sin x$ is zero at $x = k\pi$ for all integers $k$.
- Since $\csc x$ is the reciprocal of $\sin x$, it is undefined where $\sin x = 0$.
4. **Behavior near $x=0$:**
- At $x=0$, $\sin 0 = 0$, so $\csc 0$ is undefined.
- As $x \to 0^+$, $\sin x \approx x$, so $\csc x = \frac{1}{\sin x} \approx \frac{1}{x}$, which tends to $+\infty$.
- As $x \to 0^-$, similarly $\csc x \approx \frac{1}{x}$, which tends to $-\infty$.
5. **Graph features:**
- Vertical asymptote at $x=0$.
- The function has vertical asymptotes at every integer multiple of $\pi$.
- Between asymptotes, $\csc x$ has branches going to $+\infty$ and $-\infty$.
6. **Summary:** Near $x=0$, $f(x) = \csc x$ is not defined and has a vertical asymptote. The function tends to $+\infty$ from the right and $-\infty$ from the left.
**Final answer:** The graph of $f(x) = \csc x$ has vertical asymptotes at $x = k\pi$, including $x=0$, and near $0$, $f(x)$ tends to $+\infty$ as $x \to 0^+$ and $-\infty$ as $x \to 0^-$.