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OpenStudy (anonymous):
Medal award! A point (x,y) is on the unit circle. If it's y-coordinate is -12/13 and the point lies in quadrant 4, what is the other coordinate? Express your answer as a reduced fraction, no decimals!
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OpenStudy (anonymous):
|dw:1444005680956:dw|
OpenStudy (anonymous):
you are there is the x coordinate positive or negative?
OpenStudy (anonymous):
oh I got it! :)
jimthompson5910 (jim_thompson5910):
hopefully you have in your lesson/notes somewhere that \(\Large x^2 + y^2 = 1\) is the unit circle equation. Plug in y = -12/13 and solve for x (keep satellite73's drawing in mind)
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