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Mathematics 20 Online
OpenStudy (anonymous):

If the point (2/3,y) is on the unit circle, what is y?

hartnn (hartnn):

if x,y lie on the unit circle, then \(x^2+y^2 = 1 \)

hartnn (hartnn):

since, 2/3 , y lie on the unit circle, \((2/3)^2 +y^2 =1\) find y from here

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