Used the cephes numerical approximation for `math.atan`. This is a significant accuracy improvement over the previous taylor series approximation. Reviewed By: jpienaar Differential Revision: https://reviews.llvm.org/D153656
Used the cephes numerical approximation for `math.atan`. This is a significant accuracy improvement over the previous taylor series approximation. Reviewed By: jpienaar Differential Revision: https://reviews.llvm.org/D153656