xtd 0.2.0
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◆ atan()

static double xtd::math::atan ( double  value)
static

Returns the angle whose tangent is the specified number.

Parameters
valueA number representing a tangent.
Returns
An angle, A, measured in radians, such that -PI/2 <= ? <= PI/2.
-or-
math::NaN if value equals math::NaN, -PI/2 rounded to double precision (-1.5707963267949) if d equals math::negative_infinity, or PI/2 rounded to double precision (1.5707963267949) if d equals math::positive_infinity