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Description:

This function returns the arc tangent of the number or numeric expression n. The return value is expressed in radians.

Usage:

print "The arc tangent of 0.2 is "; atn(0.2)

There are 2 * pi radians in a full circle of 360 degrees. A formula to convert degrees to radians is: radians = degrees divided by 57.29577951

Note: See also TAN( )

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