If \( \sin 3 \theta=\cos \left(\theta-6^{\circ}\right) \), where \( 3 \theta \) and \( \left(\th...

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If \( \sin 3 \theta=\cos \left(\theta-6^{\circ}\right) \), where \( 3 \theta \) and \( \left(\theta-6^{\circ}\right) \) are acute angles then the value of \( \theta \) is
(a) \( 42^{\circ} \)
(b) \( 24^{\circ} \)
(c) \( 12^{\circ} \)
(d) \( 26^{\circ} \)
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