Math: Trig

The cosine trigonometric function (cos) calculates the ratio of the angle's adjacent side length to its hypotenuse length.

The inverse cosine trigonometric function (acos) calculates the angle whose cosine is the input value.

The sine trigonometric function (sin) calculates the ratio of the angle's opposite side length to its hypotenuse length.

The inverse sine trigonometric function (asin) calculates the angle whose sine is the input value.

The tangent trigonometric function (tan) calculates the ratio of the angle's opposite side length to its adjacent side length.

The inverse tangent trigonometric function (atan or atan2, depending on input type) calculates:

atan: the angle whose tangent is the input scalar number.

atan2: the angle of a ray from the origin to the input vec2.

The resulting angle is always in the range [-90°, 90°] or, in radians, [-π/2, π/2].