document.write( "Question 859610: Use a Double-or Half-Angle Formula to solve the equation in the interval [0,2π).\r
\n" ); document.write( "\n" ); document.write( "sin2θ+cosθ=0\r
\n" ); document.write( "\n" ); document.write( "Please help. I do not understand how the book is explaining this.
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Algebra.Com's Answer #517859 by richard1234(7193)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "Substitute and factor out cos theta and solve.
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