Answer
$\frac{7\pi}{4}$
Work Step by Step
$2\pi-\frac{\pi}{4}=\frac{4}{4}\times2\pi-\frac{\pi}{4}=\frac{8\pi}{4}-\frac{\pi}{4}=\frac{8\pi-\pi}{4}=\frac{7\pi}{4}$
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