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OpenStudy (anonymous):
find allvalues of x in the interval [0,2pi] that satisfy the equation. 2cosx-1=0
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OpenStudy (jdoe0001):
solve for cos(x) what do you get?
OpenStudy (anonymous):
Im not sure but my book says the answer is pi/3, 5pi/3. and I don't know how to get that answer. thanks for any help you can give me.
OpenStudy (jdoe0001):
right... so.. what did you get for cos(x)?
OpenStudy (jdoe0001):
if you were to solve for cos(x) that is
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