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De moivre’s theorem and its applications - class-XII
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Multiple Choice
If $iz^4 + 1 = 0$, then z can take the value
- $\displaystyle \frac{1 + i}{\sqrt 2}$
- $\cos \displaystyle \frac{\pi}{8} + i \sin \frac{\pi}{8}$
- $\displaystyle \frac{1}{4 i}$
- $i$