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OpenStudy (anonymous):
If sin B=21/29 ... Why do we say that B lies in the second quadrant?
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OpenStudy (irishboy123):
it should lie in the first....
OpenStudy (anonymous):
because if you look for the sin inverse of 21/29 its 46 and the fist quadrant lies between 0-90
OpenStudy (welshfella):
the sines is also positive in the second quadrant
OpenStudy (welshfella):
so the angle whose sine is 21/29 is also 180 - 46.4 = 133.6
OpenStudy (welshfella):
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