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OpenStudy (anonymous):
Can someone please explain this to me? Solve the multiple-angle equation. (Enter your answers as a comma-separated list. Let n be any integer.) cos 8x=-1
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OpenStudy (amistre64):
do you remember when cos(t) = -1?
OpenStudy (anonymous):
no. :(
OpenStudy (amistre64):
trig is mostly memorizing some fundamental properties. cos = -1 is a fundamental property that you need to have memorized.
OpenStudy (anonymous):
would it be cosx(cosx-1)=0?
OpenStudy (amistre64):
|dw:1362514001553:dw| think of the unit circle, what is the angle we use to make this picture work?
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