document.write( "Question 44341: What are the possible answers?
\n" ); document.write( "sin(x) - sin(3x) = 0
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Algebra.Com's Answer #29272 by fractalier(6550)\"\" \"About 
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\n" ); document.write( "sin x - sin 3x = 0 we get
\n" ); document.write( "sin x - sin (x + 2x) = 0
\n" ); document.write( "sin x - (sin x cos 2x - sin 2x cos x) = 0
\n" ); document.write( "sin x - (sin x * (cos^2 x - sin^2 x) - 2 sin x cos * cos x) = 0
\n" ); document.write( "sin x - (sin x * (cos^2 x - sin^2 x) - 2 sin x cos^2 x) = 0
\n" ); document.write( "how factor out sin x
\n" ); document.write( "sin x(1 - cos^2 x + sin^2 + 2 cos^2 x) = 0
\n" ); document.write( "sin x(1 + cos^2 x + sin^2) = 0
\n" ); document.write( "2 sin x = 0
\n" ); document.write( "sin x = 0
\n" ); document.write( "x = 0, pi
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