cot -- cotangent

• Usage:

  cot x

  cot I

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

i1 : cot(pi/3)

o1 = .577350269189626

o1 : RR (of precision 53)