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Question Number 100436 by Dwaipayan Shikari last updated on 26/Jun/20

α=((2π)/7)  Find the value of   tanαtan2α+tan2αtan4α+tanαtan4α

$$\alpha=\frac{\mathrm{2}\pi}{\mathrm{7}} \\ $$$$\mathrm{Find}\:\mathrm{the}\:\mathrm{value}\:\mathrm{of}\: \\ $$$$\mathrm{tan}\alpha\mathrm{tan2}\alpha+\mathrm{tan2}\alpha\mathrm{tan4}\alpha+\mathrm{tan}\alpha\mathrm{tan4}\alpha \\ $$

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