Find all $\displaystyle (x;y)\in \mathbb{R}^{2} $ if:

$\displaystyle log_{2}(cos^{2}xy+\frac{1}{cos^{2}xy})=\frac{1}{y^ {2}-2y+2}$

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- Dec 2nd 2012, 01:50 AMmetalarifind all (x;y)
Find all $\displaystyle (x;y)\in \mathbb{R}^{2} $ if:

$\displaystyle log_{2}(cos^{2}xy+\frac{1}{cos^{2}xy})=\frac{1}{y^ {2}-2y+2}$ - Dec 2nd 2012, 08:56 AMtopsquarkRe: find all (x;y)