atan(z)
Returns the arc tangent of z
CMath.atan(1 + 1i) #=> (1.0172219678978514+0.4023594781085251i)
# File lib/cmath.rb, line 297 def atan(z) begin if z.real? RealMath.atan(z) else 1.0.i * log((1.0.i + z) / (1.0.i - z)) / 2.0 end rescue NoMethodError handle_no_method_error end end
