Q. A value of $n$ such that $\left( \frac{\sqrt{3}}{2} + \frac{i}{2} \right)^{n} = 1$ is

A) 12
B) 3
C) 2
D) 1
Explanation

(a)
Given, $\left( \frac{\sqrt{3}}{2} + \frac{i}{2} \right)^{n} = 1$
$\Rightarrow \ \ \ \ \left( cis\frac{\pi}{6} \right)^{n} = 1\ \ \ \Rightarrow \ \ \ n = 12$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.