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OpenStudy (anonymous):
How to solve cos3x=1?
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OpenStudy (hysenberg):
which value of cos is 1?
OpenStudy (hysenberg):
cos0=1 so cos3x=cos0 3x=0 x=0
geerky42 (geerky42):
Not just 0. there is infinitely many values x could be, such as \(\dfrac{2}{3}\pi\), \(\dfrac{4}{3}\pi\), \(2\pi\), \(\dfrac{8}{3}\pi\) and so on
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