tan -- compute the tangent

• Usage:

  tan x

  tan I

• Inputs:
  • x, a real number
  • I, a real interval
• Outputs:
  • a real number, the tangent of x
  • a real interval, an interval containing the tangents of the points of I

i1 : tan 1

o1 = 1.557407724654902

o1 : RR (of precision 53)