Solutions
Solutions to Try Its
1. ellipse; [latex]e=\frac{1}{3};x=-2[/latex] 2.
3. [latex]r=\frac{1}{1-\cos \theta }[/latex]
4. [latex]4 - 8x+3{x}^{2}-{y}^{2}=0[/latex]
Solutions to Odd-Numbered Exercises
1. If eccentricity is less than 1, it is an ellipse. If eccentricity is equal to 1, it is a parabola. If eccentricity is greater than 1, it is a hyperbola. 3. The directrix will be parallel to the polar axis. 5. One of the foci will be located at the origin. 7. Parabola with [latex]e=1[/latex] and directrix [latex]\frac{3}{4}[/latex] units below the pole. 9. Hyperbola with [latex]e=2[/latex] and directrix [latex]\frac{5}{2}[/latex] units above the pole. 11. Parabola with [latex]e=1[/latex] and directrix [latex]\frac{3}{10}[/latex] units to the right of the pole. 13. Ellipse with [latex]e=\frac{2}{7}[/latex] and directrix [latex]2[/latex] units to the right of the pole. 15. Hyperbola with [latex]e=\frac{5}{3}[/latex] and directrix [latex]\frac{11}{5}[/latex] units above the pole. 17. Hyperbola with [latex]e=\frac{8}{7}[/latex] and directrix [latex]\frac{7}{8}[/latex] units to the right of the pole. 19. [latex]25{x}^{2}+16{y}^{2}-12y - 4=0[/latex] 21. [latex]21{x}^{2}-4{y}^{2}-30x+9=0[/latex] 23. [latex]64{y}^{2}=48x+9[/latex] 25. [latex]96{y}^{2}-25{x}^{2}+110y+25=0[/latex] 27. [latex]3{x}^{2}+4{y}^{2}-2x - 1=0[/latex] 29. [latex]5{x}^{2}+9{y}^{2}-24x - 36=0[/latex] 31.
33.
35.
37.
39.
41.
43. [latex]r=\frac{4}{5+\cos \theta }[/latex]
45. [latex]r=\frac{4}{1+2\sin \theta }[/latex]
47. [latex]r=\frac{1}{1+\cos \theta }[/latex]
49. [latex]r=\frac{7}{8 - 28\cos \theta }[/latex]
51. [latex]r=\frac{12}{2+3\sin \theta }[/latex]
53. [latex]r=\frac{15}{4 - 3\cos \theta }[/latex]
55. [latex]r=\frac{3}{3 - 3\cos \theta }[/latex]
57. [latex]r=\pm \frac{2}{\sqrt{1+\sin \theta \cos \theta }}[/latex]
59. [latex]r=\pm \frac{2}{4\cos \theta +3\sin \theta }[/latex]Licenses & Attributions
CC licensed content, Specific attribution
- Precalculus. Provided by: OpenStax Authored by: OpenStax College. Located at: https://cnx.org/contents/[email protected]:1/Preface. License: CC BY: Attribution.
