document.write( "Question 174455: Solve:
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\n" ); document.write( "\"sin%282x%29sin%28x%29=cos%28x%29\" \n" ); document.write( "
Algebra.Com's Answer #129462 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
Solve:\r
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document.write( "Use the identity \"sin%282alpha%29=2sin%28alpha%29cos%28alpha%29\"\r\n" );
document.write( "\"%282sin%28x%29cos%28x%29%29sin%28x%29=cos%28x%29\"\r\n" );
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document.write( "Get 0 on the right side:\r\n" );
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document.write( "\"2sin%28x%29cos%28x%29sin%28x%29-cos%28x%29=0\"\r\n" );
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document.write( "Factor out \"cos%28x%29\":\r\n" );
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document.write( "\"cos%28x%29%282sin%28x%29-1%29=0\"\r\n" );
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document.write( "Use the zero-factor principle:\r\n" );
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document.write( "where n is any integer, positive, negative or zero.\r\n" );
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document.write( "The solutions between 0 and 360° are\r\n" );
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document.write( "30°, 90°, and 150° \r\n" );
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document.write( "Edwin
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