Match the x-coordinates with their corresponding pairs of y-coordinates on the unit circle

y = + - square root 5 over 3

y = + - square root 7 over 3

y = + - 3 over 3

y = + - 2 square root 2 over 2

Equation of unit circle is:

x² + y² = 1

we plug in the values of y to get the values of x.

x² + √ (5/3) ² = 1

x²=1 - (5/3)

x² = - 2/3

x=√ (-2/3)

solve the rest by using the same technique and solve each value of y for x