Calculate the exact value of .

MATHEMATICS · Single correct · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

Calculate the exact value of cos⁡105∘\cos 105^\circ. (a) 6−24\dfrac{\sqrt{6}-\sqrt{2}}{4} (b) −32-\dfrac{\sqrt{3}}{2} (c) 2−64\dfrac{\sqrt{2}-\sqrt{6}}{4} (d) 6+24\dfrac{\sqrt{6}+\sqrt{2}}{4}

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