Multiples And Sub-Multiples Theorem Prove that:i)\( \sin 7\frac{1} {2}^0 = \frac{{\sqrt {4 - \sqrt 6 - \sqrt 2 } }} {{2\sqrt 2 }} \) ii)\( \cos 7\frac{1} {2}^0 = \frac{{\sqrt {4 + \s