Atan
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atan is a function that returns the arctangent of a value or ratio, that is, the
angle (in radians) whose tangent is y/x. This will return
an angle in the correct quadrant, taking into account the
sign of both arguments. The second argument is optional,
and if omitted, this function is equivalent to the traditional
one-parameter atan function. Note that the parameters are
in y,x order.
Arguments
| Parameter Name | Default Value | Meaning |
|---|---|---|
| y | number, default 0 | height of the side opposite the angle |
| x | number, default 1 | length of the side adjacent the angle |
Example
atan(1, -1) // returns 2.356194
