Express the Indicated Roots of Unity in Standard Form a $1+0 \mathrm{i}$

Multiple Choice

Express the indicated roots of unity in standard form a + bi.
-Cube roots of unity

A) $1+0 \mathrm{i}$
$$\begin{array}{l}\cos \frac{\pi}{3}+i \sin \frac{\pi}{3}=0.5+\frac{\sqrt{3}}{2} i \\\cos \frac{2 \pi}{3}+i \sin \frac{2 \pi}{3}=-0.5+\frac{\sqrt{3}}{2} \mathrm{i}\end{array}$$

B) $1+0 \mathrm{i}$
$$\begin{array}{l}\cos \frac{2 \pi}{3}+i \sin \frac{2 \pi}{3}=-0.5+\frac{\sqrt{3}}{2} i \\\cos \frac{4 \pi}{3}+i \sin \frac{4 \pi}{3}=-0.5-\frac{\sqrt{3}}{2} i\end{array}$$

C) $1+i$
$$\begin{array}{l}\cos \frac{2 \pi}{3}+i \sin \frac{2 \pi}{3}=-0.5+\frac{\sqrt{3}}{2} i \\\cos \frac{4 \pi}{3}+i \sin \frac{4 \pi}{3}=-0.5-\frac{\sqrt{3}}{2} i\end{array}$$

$\begin{array}{l}\text { D) } \cos \frac{\pi}{3}+i \sin \frac{\pi}{3}=0.5+\frac{\sqrt{3}}{2} i \\\cos \frac{2 \pi}{3}+i \sin \frac{2 \pi}{3}=-0.5+\frac{\sqrt{3}}{2} i \\\cos \frac{4 \pi}{3}+i \sin \frac{4 \pi}{3}=-0.5-\frac{\sqrt{3}}{2} i\end{array}$