atan

fn atan(float x) -> float

Returns the arctangent of x, in radians in -pi/2..=pi/2.

Parameters#

Returns#

float

Examples#

use tests::assert;
assert!(atan(0.0) == 0.0);
assert!(atan(1.0) * 4.0 == 3.141592653589793);

See also#

• sin: Returns the sine of x (in radians).
• cos: Returns the cosine of x (in radians).
• tan: Returns the tangent of x (in radians).
• sqrt: Returns the square root of x.
• floor: Returns the largest whole number less than or equal to x, as a float.
• ceil: Returns the smallest whole number greater than or equal to x, as a float.
• exp: Returns e raised to the power x.
• ln: Returns the natural logarithm of x.