It is given that $$\(3 \sin 2 \theta=\cos \theta\)$$ where $$\(\theta\)$$ is an angle such that $$\(0^{\circ}<\theta<90^{\circ}\)$$. Find the exact value of $$\(\cos 2 \theta\)$$. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................

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