Question

Find all numbers u (if any) so that the point \left( -\frac{2}{7}, u \right) is on the unit circle. Select the correct choice below and, if necessary, fill in the answer box within your choice. A. $u = \frac{3\sqrt{5}}{7}, -\frac{3\sqrt{5}}{7}$ (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) B. There are no values of u such that the given point is on the unit circle.

          Find all numbers u (if any) so that the point \left( -\frac{2}{7}, u \right) is on the unit circle.
Select the correct choice below and, if necessary, fill in the answer box within your choice.
A.  $u = \frac{3\sqrt{5}}{7}, -\frac{3\sqrt{5}}{7}$
(Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)
B. There are no values of u such that the given point is on the unit circle.

$Find all numbers u (if any) so that the point ( -(2)/(7), u ) is on the unit circle. Select the correct choice below and, if necessary, fill in the answer box within your choice. A. u = (3√(5))/(7), -(3√(5))/(7) (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) B. There are no values of u such that the given point is on the unit circle.$

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