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| 1. |
\begin{array}{l}{\text { Without using the trigonometric tables, find }} \\ {\text { (i) (a) } \cos 75^{\circ}} \\ {\text { (ii) (a) } \sin 15^{\circ}} \\ {\text { (ii) (a) } \sin 105^{\circ}} & {\text { (b) } \cos 15^{\circ}}\end{array} |
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