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Elliptic Rotation

Leaves the Circle

\begin{displaymath}
x^2+y^2=1
\end{displaymath}

invariant.
$\displaystyle x'$ $\textstyle =$ $\displaystyle x\cos\theta-y\sin\theta$  
$\displaystyle y'$ $\textstyle =$ $\displaystyle x\sin\theta+y\sin\theta.$  

See also Equiaffinity




© 1996-9 Eric W. Weisstein
1999-05-25