Efficient Approximations for the Arctangent Function

@inproceedings{Rajan2000EfficientAF,
  title={Efficient Approximations for the Arctangent Function},
  author={Sreeraman Rajan and Sichun Wang and Robert J. Inkol and Alain Joyal},
  year={2000}
}
1053-5888/06/$20.00©2006IEEE T his article provides several efficient approximations for the arctangent function using Lagrange interpolation and minimax optimization techniques. These approximations are particularly useful when processing power, memory, and power consumption are important issues. In addition to comparing the errors and the computational workload of these approximations, we also extend them to all four quadrants. 
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