atan(RR) -- compute the arctangent of a number

Synopsis

• Usage:

  atan x

• Function: atan
• Inputs:
  • x, a real number
• Outputs:
  • a real number, the arctangent (in radians) of x

Description

i1 : atan 1

o1 = .785398163397448

o1 : RR (of precision 53)

i2 : abs atan 1 == pi/4

o2 = true

See also

• atan2 -- compute an angle of a certain triangle