Atan

Description of formula:
Calculates the arctangent of a specified number. Arctangent is the angle, whose tangent is equal to value passed as a parameter, e.g.
atan(1) = π/4, because tan(π/4) = 1
The returned value is given in radians, in range from –π/2 to π/2.
Syntax:
atan(number)
Parameters:
number
(type: Number) The tangent of the angle
Returned type:
Number
Examples:
=atan(-1)
=atan(Section1.A1)
=atan(A)
=atan(B3)
Remarks:
If you want to get value in degrees, multiply the result by 180/pi().
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