From: "Alberto Monteiro" > Ronn Blankenship wrote: > > > > I'm sure there's some significance to the fact that > > > > cos(cos(cos(cos( ...(0) ... )))) = 0.7390851332151605416... > > > Ok, if you want to play with numbers, try this: > > asinh(tan(0.42)) = atanh(sin(0.42)) > That's trivially true. When I was a student we spent one rainy afternoon working out what numbers we could get from our calculators using only the unitary buttons, starting fom 0 and never touching another number afterwards. It took a dozen maths students twenty minutes to work out how to generate all the integers, then we went after the rationals. Robert
