I'm not sure how to solve using general solutions$\displaystyle \sin{3\theta}=3\sin{\theta}$
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Originally Posted by aonin I'm not sure how to solve using general solutions$\displaystyle \sin{3\theta}=3\sin{\theta}$ Start by simplifying the LHS using the identity $\displaystyle \displaystyle \sin{3\theta} \equiv 3\sin{\theta} - 4\sin^3{\theta}$.
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