atan2

x atan2 y

Operand types:

x: Number

y: Number

Type of returned value:

Number

Description:

Returns the arctangens of x/y.

Returned value is in degrees, in the range -180 to +180, using the signs of both parameters to determine the quadrant of the return value.

Positive angles are clockwise and negative angles are counter-clockwise.

Example:

_angle = 5 atan2 3 ..........Result is 59.0362

Notes:
atan2 is safer than the alternative atan.

This is because atan2 will correctly return the angle when the tangent is infinite:
1 atan2 0
will correctly return the answer 90.
atan 1/0 will return a Divide by Zero Error