General Notice
I have been informed that on March 7th from 6:00am to 6:00pm Central Time Lamar University will be doing some maintenance to replace a faulty UPS component and to do this they will be completely powering down their data center.
Unfortunately, this means that the site will be down during this time. I apologize for any inconvenience this might cause.
Paul
February 18, 2026
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Section 9.6 : Polar Coordinates
- For the point with polar coordinates \(\displaystyle \left( {2,\frac{\pi }{7}} \right)\) determine three different sets of coordinates for the same point all of which have angles different from \(\displaystyle \frac{\pi }{7}\) and are in the range \( - 2\pi \le \theta \le 2\pi \). Solution
- The polar coordinates of a point are \(\left( { - 5,0.23} \right)\). Determine the Cartesian coordinates for the point. Solution
- The Cartesian coordinate of a point are \(\left( {2, - 6} \right)\). Determine a set of polar coordinates for the point. Solution
- The Cartesian coordinate of a point are \(\left( { - 8,1} \right)\). Determine a set of polar coordinates for the point. Solution
For problems 5 and 6 convert the given equation into an equation in terms of polar coordinates.
- \(\displaystyle \frac{{4x}}{{3{x^2} + 3{y^2}}} = 6 - xy\) Solution
- \(\displaystyle {x^2} = \frac{{4x}}{y} - 3{y^2} + 2\) Solution
For problems 7 and 8 convert the given equation into an equation in terms of Cartesian coordinates.
- \(6{r^3}\sin \theta = 4 - cos\theta \) Solution
- \(\displaystyle \frac{2}{r} = \sin \theta - \sec \theta \) Solution
For problems 9 – 16 sketch the graph of the given polar equation.