Please help and explain so i can learn (:

  x = 1/2

Step-by-step explanation:

We can solve the equation of the unit circle for x, then fill in the given value for y and evaluate.

  x^2 +y^2 = 1

  x^2 = 1 -y^2

  x = √(1 -y^2)

Using y = (√3)/2, we get ...

  x = √(1 -((√3)/2)^2) = √(1 -3/4) = √(1/4)

  x = 1/2

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The point is ...

To see the other side of this calculation, check out ...

1

step-by-step explanation:

it's the only multiple of both and the least