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MathGroup Archive 2006

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Forcing surds into the numerator

  • To: mathgroup at
  • Subject: [mg64656] Forcing surds into the numerator
  • From: "Tony King" <mathstutoring at>
  • Date: Sat, 25 Feb 2006 02:53:17 -0500 (EST)
  • Sender: owner-wri-mathgroup at

Does anyone know how I can force Mathematica to display surds in the 
numerator of an expression, or a function that can be applied to do the job?

For example, FullSimplify[1/(3+Sqrt[2])] returns itself and not 1/7 

Similarly, Sin[Pi/12] returns (-1+root3)/(2root2) and not 1/4 (root6-root2)

Many thanks


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