Chapter 2 - Review - Concept Check - Page 165: 6

(a) This function does not have any asymptotes. (b) This function does not have any asymptotes. (c) This function has vertical asymptotes for $x=(2m-1)\pi/2$ where $m$ is an integer. Here the function always goes to $+\infty$ from the left and to $-\infty$ to the right. (d) This function has two horizontal asymptotes: $y=\pi/2$ when $x$ goes to $+\infty$ and $y=-\pi/2$ when $x$ goes to $-\infty$. (e) This function has the horizontal asymptote $y=0$ when $x$ goes to $-\infty$. (f) This function has the vertical asymptote $x=0$ and it goes to $-\infty$ when $x$ approaches from the right. (g) This function has a vertical asymptote $x=0$ and a horizontal asymptote $y=0$. The function goes to $-\infty$ from the left and $+\infty$ from the right. (h) This function has no asymptotes.

(a) This function does not have any asymptotes. (b) This function does not have any asymptotes. (c) This function has vertical asymptotes for $x=(2m-1)\pi/2$ where $m$ is an integer. Here the function always goes to $+\infty$ from the left and to $-\infty$ to the right. (d) This function has two horizontal asymptotes: $y=\pi/2$ when $x$ goes to $+\infty$ and $y=-\pi/2$ when $x$ goes to $-\infty$. (e) This function has the horizontal asymptote $y=0$ when $x$ goes to $-\infty$. (f) This function has the vertical asymptote $x=0$ and it goes to $-\infty$ when $x$ approaches from the right. (g) This function has a vertical asymptote $x=0$ and a horizontal asymptote $y=0$. The function goes to $-\infty$ from the left and $+\infty$ from the right. (h) This function has no asymptotes.