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# ATAN

## Name

ATAN --

## Synopsis

    ATAN(x)

## Description

ATAN function calculates the arc tangent of @x; that is the value whose tangent is @x. Return value is in radians. This function is Excel compatible.

## Examples

ATAN(0.5) equals 0,463648.

ATAN(1) equals 0,785398.

## See also

TAN, COS, SIN, DEGREES, RADIANS.

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