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based on an earlier version of the Wolfram Language.
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gives the hyperbolic secant of z.
  • Mathematical function, suitable for both symbolic and numerical manipulation.
  • sech(z)=1/cosh(z).
  • For certain special arguments, Sech automatically evaluates to exact values.
  • Sech can be evaluated to arbitrary numerical precision.
  • Sech automatically threads over lists.
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