Ax²+Bxy+Cy²+Dx+Ey+F=0 A’(x’)²+C’(y’)²+D’x’+E’y’+F’=0 cos2θ=A-C/B x=x’cosθ-y’sinθ y=x’sinθ+y’cosθ
Steps to Rotate a Conic:
1. Find the angle using the 3rd equation above
2. Plug angle measure from unit circle into last 2 equations to get new x’ and y’
3. Plug back into the original equation and make sure the xy-term cancels out
Credit by Alec Ainger
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