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OpenStudy (anonymous):
Can someone please help me thank you! solve the equation cosx=-1/2 if 0 ≤ x ≤ 360
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OpenStudy (anonymous):
Any help is appreciated thank you
OpenStudy (anonymous):
I believe the answer is 120 degrees and 240 degrees, is that correct?
OpenStudy (anonymous):
cosx = -1/2 x = cos-1 (1/2) = 60 cos is only negative in the second and third quadrant therefore, ITS EITHER x =(180 -60) =120 OR X = (180 + 60) =240
OpenStudy (anonymous):
DEGREES
OpenStudy (anonymous):
Thank you!
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OpenStudy (anonymous):
You explained it so well!
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