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Derivation of atan2(y, x)
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The derivation of the principal value of the argument:
It follows that
Note that √x2 + y2 + x ≠ 0 in the domain in question. Computation gives
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The derivation of the principal value of the argument:
It follows that
Note that √x2 + y2 + x ≠ 0 in the domain in question. Computation gives