If and lies in the third quadrant

MATHEMATICS · Single correct · GCSE · Mathematics · Geometry and Measures · Geometry and Measures

Problem

If cos⁡x=−513\cos x = -\dfrac{5}{13} and xx lies in the third quadrant, calculate tan⁡x\tan x. (a) −125-\dfrac{12}{5} (b) 1213\dfrac{12}{13} (c) 125\dfrac{12}{5} (d) 512\dfrac{5}{12}

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