I got stuck in these 2 equations :
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Originally Posted by ldx2 I got stuck in these 2 equations : second one: you can combine those two expressions into a single log. Which is the difference of two squares This is equal to 1 \log_{1/3} cos^2(2x) = \pm 1 or The second solution is not a solution because cos^2(2x) cannot be 3
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