AP

MATHEMATICS · Single correct · AP · AP Precalculus · Trigonometric and Polar Functions · Trigonometric and Polar Functions

Problem

If tan⁡−1x+2cot⁡−1x=2π3\tan^{-1} x + 2 \cot^{-1} x = \frac{2\pi}{3} , then x=x = (a) 2\sqrt{2} (b) 3 (c) 3\sqrt{3} (d) 3−13+1\frac{\sqrt{3}-1}{\sqrt{3}+1}

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