If $0 \le \theta \le 4 \pi,$ find all values of $\theta$ which satisfy
\[\log_{\frac{1}{2} \sin 2 \theta} \sin \theta = \frac{1}{2}.\]Enter all the solutions, separated by commas.
<|im_start|>system
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<|im_start|>user
If $0 \le \theta \le 4 \pi,$ find all values of $\theta$ which satisfy
\[\log_{\frac{1}{2} \sin 2 \theta} \sin \theta = \frac{1}{2}.\]Enter all the solutions, separated by commas.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{\pi}{4}, \frac{9 \pi}{4}
If $0 \le \theta \le 4 \pi,$ find all values of $\theta$ which satisfy
\[\log_{\frac{1}{2} \sin 2 \theta} \sin \theta = \frac{1}{2}.\]Enter all the solutions, separated by commas.
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