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Re: Rearrangement of expression

expr = a/Sqrt[a^2 + b^2];

Simplify[expr /. b -> a*c, a > 0] /. c -> b/a

1/Sqrt[b^2/a^2 + 1]

Bob Hanlon

---- "Gehricht at" <Gehricht at> wrote: 


Suppose I have the fraction a/Sqrt[a^2+b^2]. How can I rearrange it to
With thanks
Yours Wolfgang


Bob Hanlon

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