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| 1. |
\left. \begin{array} { l } { \text { If } \operatorname { sin } 3 \theta = \operatorname { cos } ( \theta - 6 ^ { \circ } ) , \text { where } 3 \theta \text { and } ( \theta - 6 ^ { \circ } ) \text { are acute ar } } \\ { ( 1 ) 42 ^ { \circ } } \end{array} \right. |
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