1.

Cos105° =(A) \(\frac{1+\sqrt{3}}{2}\)(B) \(\frac{1+\sqrt{3}}{2\sqrt{2}}\)(C) \(\frac{1-\sqrt{3}}{2\sqrt{2}}\)(D) \(\frac{1+\sqrt{3}}{2}\)

Answer»

Correct option is: (C) \(\frac{1-\sqrt{3}}{2\sqrt{2}}\)



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