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OpenStudy (anonymous):
Precalc question.. need someone to check my work!
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OpenStudy (anonymous):
find cos x if \[\frac{\sin^2x-1 }{ \cos x }=-1\]
OpenStudy (anonymous):
my answer is 1... and this is how i got it
OpenStudy (anonymous):
|dw:1432431764039:dw| is this correct??
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