Question

Which of the following could be points on the unit circle?

Answer 1

\[A. (\frac{ \sqrt{3} }{ 2 }, \frac{ 1 }{ 3 })\]
\[B. \frac{ -2 }{ 3 }, \frac{ \sqrt{5} }{ 3 }\]
\[C. (1,1)\]
\[D. (0.8, -0.6)\]