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Liam M. Healy authored
New arguments default and zero-enough to handle case where arctangent is undefined; if both numerator and denominator are essentially zero (that is, absolute value less than zero-enough), then return default.
485b39e6
New arguments default and zero-enough to handle case where arctangent is undefined; if both numerator and denominator are essentially zero (that is, absolute value less than zero-enough), then return default.