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March 22nd, 2017, 05:57 PM   #1
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Rotations of Conic Section Equations

I am doing an online math course over conic sections and the rotation of them and how to apply rotations to their equations. I cannot figure out one of the problems as the lessons they give me do not explain the method needed to solve the problem. The problem is:

Transform the equation xy=1 by rotation, thus eliminating the xy term.

How do I go about doing this?

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March 22nd, 2017, 06:34 PM   #2
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Note that $xy=1$ is a hyperbola. There is only one choice from the three options that has the form of a hyperbola ... the other two are ellipses.


If you want to see a direct calculation, see page 3 at the link ...

http://math.sci.ccny.cuny.edu/document/show/2685
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