Question 852483
The point P(x,y) is on the unit circle in Quadrant IV.  If x=sqrt11/6 , find y.
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The radius is 1, so {{{x^2 + y^2 = 1}}} for all points.
{{{y = sqrt(1 - 11/36) = sqrt(25/36)}}}
y = 5/6
Negative in Q4 --> y = -5/6