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Geometry Level 2

Which of these trigonometric equations is/are impossible in \(\mathbb{R}\)?

A. \( \displaystyle \tan x=\frac{\pi}{2} \)

B. \( \displaystyle \tan \frac{\pi}{2}=x \)

C. \( \displaystyle \sin x=\frac{\pi}{2} \)

D. \( \displaystyle \sin \frac{\pi}{2}=x \)

E. \( \displaystyle \arcsin x=x \)

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