ATAN2D

Syntax: | `vout = ATAN2D( v1, v2 )`

The `ATAN2D(v1,v2)` function returns the Arc Tangent of `v1/v2` in degrees, with `-180° < ATAN2D(v1,v2) ≤ 180°`.

- If `v1 > 0`, the result is positive.
- If `v1 = 0`, the result is zero if `v2 > 0` and `180°` if `v2 < 0`.
- If `v1 < 0`, the result is negative. If the value of the second argument is zero, the absolute value of the result is `90°`.

Both arguments must not have the value zero.