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Text File  |  1992-04-12  |  109b  |  7 lines
  1. cosh(x)^2 - sinh(x)^2 = 1
  2. tanh(x)^2 + sech(x)^2 = 1
  3. coth(x)^2 - csch(x)^2 = 1
  4. tanh(x)*coth(x) = 1
  5.  
  6. end
  7.