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ATAN function

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Returns the arctangent, or inverse tangent, of the given number. The result will be in radians or degrees, depending on the Angles options. ATAN returns a value in the range –PI/2 to PI/2 radians (or -90 to 90 degrees). With "degrees" selected, atan(1) returns 45.



See also:

ATAN2 function



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