std::atan

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Defined in header <cmath>

float       atan( float arg );

double      atan( double arg );

long double atan( long double arg );

Computes arc tangent of arg

[edit] Parameters

arg - floating point value

[edit] Return value

arc tangent of arg in radians in the range of [-π/2; π/2] radians.

[edit] See also

atan2
arc tangent, using signs to determine quadrants
(function)
asin
computes arc sine (arcsin(x))
(function)
acos
computes arc cosine (arccos(x))
(function)
tan
computes tangent (tan(x))
(function)