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OpenStudy (anonymous):
find theta, round nearest degree. cos theta = -0.4772, theta in quad 3. Answer is 241 degree, how?
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OpenStudy (anonymous):
cos(x) = -0.4772 arccos(-0.4722) = x x = 118.5 degrees
OpenStudy (anonymous):
241 is the reference angle to 118.5 degrees. 118.5 degrees = 119 degrees 119+241=360 degrees
OpenStudy (anonymous):
cos(119 degrees) = cos (241 degrees)
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