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atan is the normal arc-tangent or inverse tangent function. atan2 - available in many programming languages - takes two parameters (arguments) instead of one, that represent the coordinates of a point. If the coordinates are, for example, (5, 3), the calculation is equivalent to atan(5/3). However, if the point is in other quadrants, the function will return an angle in the correct quadrant. For example, for (-5, -3), it will return an angle in the third quadrant.

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14y ago

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