If (x,y) is a point on the unit circle in quadrant IV and if x = , what is y?

**Solution:-**

If the point (x,y) is on the unit circle, then the point satisfies the equation of the unit circle

=1

Evaluate

Solve for y.

Take the square root of both sides.

y =

y =

In quadrant IV, the y-coordinate of the point is negative. Therefore, y = –