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OpenStudy (eric_d):
find values of x, between - pi and pi, satisfying the following inequalities
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OpenStudy (eric_d):
\[2\cos2x > 3cosx-1\]
OpenStudy (eric_d):
@IMStuck
OpenStudy (imstuck):
hmmm...let me think on that for a bit. ok?
OpenStudy (eric_d):
ok
OpenStudy (anonymous):
try subtracting 3cosx from both sides
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OpenStudy (imstuck):
almost there...factoring now...
OpenStudy (primeralph):
|dw:1405578259866:dw|
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