document.write( "Question 148633: Prove the identity:\r
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Algebra.Com's Answer #108978 by Edwin McCravy(20056) $\"\"$ $\"About$

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Prove the identity:\r
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document.write( "Make two fractions out of the left side:\r\n" );
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document.write( "Substitute  for .\r\n" );
document.write( "Substitute  for both 's.\r\n" );
document.write( "Substitute  for .\r\n" );
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document.write( "Invert and multiply:\r\n" );
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document.write( "Simplify:\r\n" );
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document.write( "Combine the numerators over the common denominator:\r\n" );
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document.write( "Factor  out of the numerator:\r\n" );
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document.write( "Replace  by \r\n" );
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document.write( "Cancel the 's\r\n" );
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document.write( "Edwin

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