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OpenStudy (anonymous):
solve the following equation algebraically give answers as exact solutions. sec x = -2
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OpenStudy (danjs):
sec(x) = 1 / cos(x)
OpenStudy (danjs):
-2cos(x) = 1 cos(x) = -1/2 when?
OpenStudy (danjs):
Cosine is the x value of a point on the unit circle
OpenStudy (danjs):
|dw:1419039129132:dw|
OpenStudy (danjs):
120 and 240 degrees
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OpenStudy (danjs):
measured from the +x axis
OpenStudy (danjs):
2pi rad = 360 deg for conversion if you need to
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