document.write( "Question 957649: Find all solutions to 3sin(2x) - cosx = 0 over the interval [0,360]. Round all non-integer answers to the nearest tenth of a degree.\r
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document.write( "I know that sin 2x = 2sinxcosx so I get 3(2sinxcosx) - cosx = 0.
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document.write( "I just don't know what to do after that. \n" );
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Algebra.Com's Answer #585234 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Find all solutions to 3sin(2x) - cosx = 0 over the interval [0,360]. Round all non-integer answers to the nearest tenth of a degree.\r \n" ); document.write( "\n" ); document.write( "I know that sin 2x = 2sinxcosx so I get 3(2sinxcosx) - cosx = 0. \n" ); document.write( "I just don't know what to do after that. \n" ); document.write( "========================= \n" ); document.write( "3(2sinxcosx) - cosx = 0 \n" ); document.write( "6sin*cos - cos = 0 \n" ); document.write( "--- \n" ); document.write( "Factor it. \n" ); document.write( "cos*(6sin - 1) = 0 \n" ); document.write( "cos(x) = 0 \n" ); document.write( "===================== \n" ); document.write( "sin(x) = 1/6 \n" ); document.write( " \n" ); document.write( " |