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Find the general solutions of the following equation: `t a n2thetat a ntheta=1`

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Given, `tan 2theta tan theta = 1`
Using the formula `tan 2A = 2 tan A/(1 – tan^2A),`
=`[(2 tan theta)/ (1 – tan2theta)] tan theta = 1`
=`2 tan^2theta = 1 – tan^2theta`
...
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