1.

• A. $\sqrt{2} \left(\cos \frac{\mathrm{\pi }}{4}) + i \sin \frac{\mathrm{\pi }}{4}\right)$
• B. $\sqrt{2} \left(\cos \frac{\mathrm{\pi }}{4}) + i \sin \frac{\mathrm{\pi }}{4}\right)$
• C. $\sqrt{2} \left(\cos \frac{\mathrm{\pi }}{4}) + i \sin \frac{\mathrm{\pi }}{4}\right)$
• D. $\sqrt{2} \left(\cos \frac{\mathrm{\pi }}{4}) + i \sin \frac{\mathrm{\pi }}{4}\right)$

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