Question
Answer
$$(sqrt\cdot2(cos\dfrac{2pi}{3}+isin\dfrac{2pi}{3}))^3=(sqrt\cdot2(cos\dfrac{2pi}{3}+i^2ns\dfrac{2pi}{3}))^3$$
Explanation
| $$ \begin{aligned}(sqrt\cdot2(cos\frac{2pi}{3}+isin\frac{2pi}{3}))^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}(sqrt\cdot2(cos\frac{2pi}{3}+i^2ns\frac{2pi}{3}))^3\end{aligned} $$ | |
| ① | $$ i s i n = i^{1 + 1} n s = i^2 n s $$ |
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