The `sin()`

CSS function is a trigonometric function that returns the sine of a number, which is a value between `-1`

and `1`

. The function contains a single calculation that must resolve to either a `<number>`

or an `<angle>`

by interpreting the result of the argument as radians. That is, `sin(45deg)`

, `sin(0.125turn)`

, and `sin(3.14159 / 4)`

all represent the same value, approximately `0.707`

.