Atan2
Returns the arctangent of a ratio
Syntax
`
Declare Function Atan2 ( ByVal y As Double, ByVal x As Double ) As Double
`
Usage
`
result = ATan2( y, x )
`
Parameters
`y`
Vertical component of the ratio.
`x`
Horizontal component of the ratio.
Return Value
The angle whose tangent is `y/x`, in radians, in the range [-Pi..Pi].
Description
`ATan2` returns the arctangent of the ratio `y/x` as a `Double` within the range of -Pi to Pi. The arctangent is the inverse of the `Tan` function. The returned angle is measured in radians (not degrees).
Example
`
Print Atan2 ( 4, 5 ) 'this is the same as PRINT ATN ( 4 / 5 )
`
The output would be:

    0.6747409422235527

Differences from QB

- New to FreeBASIC

Dialect Differences

- Not available in the -lang qb dialect unless referenced with the alias `__Atan2`.

See also

- `Tan`
- `Atn`
- A Brief Introduction To Trigonometry