Find, in surd form, the value of \(\cos 165\).

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Find, in surd form, the value of \(\cos 165\).

\(\frac{1}{4}(\sqrt{6} + \sqrt{2})\)

\(\frac{1}{4}(\sqrt{6} - \sqrt{2})\)

\(-\frac{1}{4}(\sqrt{6} - \sqrt{2})\)

\(-\frac{1}{4}(\sqrt{6} + \sqrt{2})\)

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