Express the Indicated Roots of Unity in Standard Form a

Multiple Choice

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

A) $\begin{array}{l}1+0 \mathrm{i} \\\cos \frac{\pi}{5}+\mathrm{i} \sin \frac{\pi}{5} \approx 0.81+0.59 \mathrm{i} \\\cos \frac{2 \pi}{5}+i \sin \frac{2 \pi}{5} \approx 0.31+0.95 \mathrm{i} \\\cos \frac{3 \pi}{5}+i \sin \frac{3 \pi}{5} \approx-0.31+0.95 \mathrm{i} \\\cos \frac{4 \pi}{5}+i \sin \frac{4 \pi}{5} \approx-0.81+0.59 \mathrm{i}\end{array}$

B) $\begin{array}{l}1+0 i \\\cos \frac{2 \pi}{5}+i \sin \frac{2 \pi}{5} \approx 0.31+0.95 \mathrm{i} \\\cos \frac{4 \pi}{5}+i \sin \frac{4 \pi}{5} \approx-0.81+0.59 i \\\cos \frac{6 \pi}{5}+i \sin \frac{6 \pi}{5} \approx-0.81-0.59 i \\\cos \frac{8 \pi}{5}+i \sin \frac{8 \pi}{5} \approx 0.31-0.95 \mathrm{i}\end{array}$

C) $\begin{array}{l}\cos \frac{2 \pi}{5}+i \sin \frac{2 \pi}{5} \approx 0.31+0.95 \mathrm{i} \\\cos \frac{4 \pi}{5}+i \sin \frac{4 \pi}{5} \approx-0.81+0.59 \mathrm{i} \\\cos \frac{6 \pi}{5}+i \sin \frac{6 \pi}{5} \approx-0.81-0.59 \mathrm{i} \\\cos \frac{8 \pi}{5}+i \sin \frac{8 \pi}{5} \approx 0.31-0.95 \mathrm{i} \\\cos \frac{12 \pi}{5}+i \sin \frac{12 \pi}{5} \approx 0.31+0.95 \mathrm{i}\end{array}$

D) $\begin{array}{l}1+0 i \\\cos \frac{2 \pi}{5}+i \sin \frac{2 \pi}{5} \approx 0.31+0.95 i \\\cos \frac{4 \pi}{5}+i \sin \frac{4 \pi}{5} \approx-0.81+0.59 i \\\cos \frac{6 \pi}{5}+i \sin \frac{6 \pi}{5} \approx-0.81-0.59 i \\\cos \frac{8 \pi}{5}+i \sin \frac{8 \pi}{5} \approx 0.31-0.95 i\end{array}$