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OpenStudy (anonymous):
In which quadrants is it possible to have an angle's sine ratio negative?
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OpenStudy (anonymous):
You're asking in which quadrants can sin be negative right? It's the 3rd and 4rth quadrant, where sin is negative.
OpenStudy (barrycarter):
Sin is the y value in the unit circle, and that's only negative in quadrants III and IV, as vengenance921 notes.
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