Class 11Mathematics1 Complex Numbers and Quadratic Equations: Complex NumbersDe Moivre's theorem and Roots of unity
Difficultयदि ${x_r} = \cos \left( \frac{\pi }{2^r} \right) + i\sin \left( \frac{\pi }{2^r} \right)$ है,तो ${x_1} \cdot {x_2} \cdot {x_3} \cdots \infty$ का मान क्या होगा?
- A$-3$
- B$-2$
- C$-1$
- D$0$
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