document.write( "Question 1187250: solve cos(3x) = cos(0.5x) for 0 <= x <= 180 degrees \n" ); document.write( "

Algebra.Com's Answer #818367 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "Write both angles in terms of their average.\r\n" );
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document.write( "Their average is \r\n" );
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document.write( " and \r\n" );
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document.write( "Substituting in original equation,\r\n" );
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document.write( "; \r\n" );
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document.write( ";   ;\r\n" );
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document.write( " and  so the above is\r\n" );
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document.write( ";   \r\n" );
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document.write( "But since ,\r\n" );
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document.write( ",    , \r\n" );
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document.write( ",    , \r\n" );
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document.write( ",    , \r\n" );
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document.write( "Since n is an integer, n is either 0 or 1.\r\n" );
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document.write( "So the solutions are\r\n" );
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document.write( "that is, x=0, and\r\n" );
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document.write( "So there are 3 solutions.\r\n" );
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document.write( ", , and \r\n" );
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document.write( "Edwin

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