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OpenStudy (anonymous):
solve cos(3theta)=-1
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OpenStudy (anonymous):
are you solving for theta? numerically? graphically?
OpenStudy (anonymous):
theta = arccos(-1) / 3
OpenStudy (anonymous):
however, it makes a difference if you are in radians or degrees... just so you know
OpenStudy (anonymous):
Sorry, the question is to solve algebraically.
OpenStudy (anonymous):
Cos pi is minus 1
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