document.write( "Question 424118: Please help me solve this equation for an exact value: \r
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\n" ); document.write( "\n" ); document.write( "tan(cos-1(1/2)-sin-1(3/4))\r
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\n" ); document.write( "\n" ); document.write( "tan(α-β)=(tan α - tan β) / (1 + tan α * tan β)\r
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\n" ); document.write( "\n" ); document.write( "tan (√3-(3/√7)) = (√3-(3/√7))/(1+(√3*(3/√7)))\r
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Algebra.Com's Answer #295755 by Edwin McCravy(20063)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Write that as\r\n" );
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document.write( "Multiply that by \"sqrt%287%29%2Fsqrt%287%29\" written as\r\n" );
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document.write( "\"%28sqrt%287%29%2F1%29%2F%28sqrt%287%29%2F1%29\"\r\n" );
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document.write( "Distribute and get:\r\n" );
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document.write( "\"%0D%0A%0D%0A%28sqrt%2821%29-3%29%2F%28sqrt%287%29%2B3sqrt%283%29%29+\"\r\n" );
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document.write( "Rationalize the denominator by multiplying by\r\n" );
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document.write( "\"%28sqrt%287%29-3sqrt%283%29%29%2F%28sqrt%287%29-3sqrt%283%29%29\"\r\n" );
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document.write( "\"%2816sqrt%283%29-12sqrt%287%29%29%2F%28-20%29\"\r\n" );
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document.write( "Reverse the terms on the top\r\n" );
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document.write( "\"%28-12sqrt%287%29%2B16sqrt%283%29%29%2F%28-20%29\"\r\n" );
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document.write( "Factor -4 out of the top:\r\n" );
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document.write( "\"%28-4%283sqrt%287%29-4sqrt%283%29%29%29%2F%28-20%29\"\r\n" );
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document.write( "The -4 cancels into the -20 giving 5 on the bottom:\r\n" );
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document.write( "\"%283sqrt%287%29-4sqrt%283%29%29%2F5\"\r\n" );
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document.write( "Edwin
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