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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Originally Posted by metalari Find all $\displaystyle (x;y)\in \mathbb{R}^{2} $ if: $\displaystyle log_{2}(cos^{2}xy+\frac{1}{cos^{2}xy})=\frac{1}{y^ {2}-2y+2}$ Please show what work you've been able to do so far. -Dan