If and lies in Quadrant III

MATHEMATICS · Single correct · CBSE · Mathematics · Introduction to Trigonometry · Introduction to Trigonometry

Problem

If cos⁡θ=−725\cos\theta = -\dfrac{7}{25} and θ\theta lies in Quadrant III, calculate 1−2sin⁡2θ1-2\sin^{2}\theta. (a) 49625\dfrac{49}{625} (b) −527625-\dfrac{527}{625} (c) 527625\dfrac{527}{625} (d) 337625\dfrac{337}{625}

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