Question

If the point(x,3√3)is on the unit circle, what is x?

Answer 1

on the unit circle, \[x ^{2} + y ^ {2} = 1\]

Answer 2

there are four answers

Answer 3

2/3
\[\sqrt{6}/3\]
4/9
\[\sqrt{2}/3\]

Answer 4

\[x^2+y^2 =1\]
Now we have \[y=\frac{ \sqrt{3} }{ 3 }\]

Answer 5

those are my four options

Answer 6

So then we plug this in \[x^2+(\frac{ \sqrt{3} }{ 3})^2=1\]
Giving us \[x^2+\frac{ 3}{ 9 }= x^2+\frac{ 1 }{ 3}=1\]

Answer 7

i see what your saying but that isnt one of the given options

Answer 8

Thats because that's not the answer :), Solve for x And that should be your answer.

Answer 9

would it be \[\sqrt{2}/3\]?