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Answered 2010-11-04 04:28:10

2sinxcosx-cosx=0

Factored : cosx(2sinx-1)=0

2 solutions:

cosx=0 or sinx=.5

For cosx=0, x=90 or 270 degrees

For sinx=.5, x=30 degrees

x = {30, 90, 270}

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