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

Problem

Evaluate sin⁡(−17π4)+cos⁡(−7π3)\displaystyle \sin\left(-\dfrac{17\pi}{4}\right)+\cos\left(-\dfrac{7\pi}{3}\right). (a) −22−12-\dfrac{\sqrt{2}}{2}-\dfrac{1}{2} (b) 22+12\dfrac{\sqrt{2}}{2}+\dfrac{1}{2} (c) −22+12-\dfrac{\sqrt{2}}{2}+\dfrac{1}{2} (d) −22+32-\dfrac{\sqrt{2}}{2}+\dfrac{\sqrt{3}}{2}

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