ATan (arcus tangent)

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Returns arctangent (value of angle of given tangens number).

syntax

ATan(tangens)

input

real number

returns

real number range:

- radian: <-Pi/2,Pi/2>

- degree: <-90,90>

- gradus: <-100,100>

example

ATan(1) = 45 when measure of angle is degree.