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Math.atan2() Method
This function returns an implementation-dependent approximation to the arctangent of the quotient of its arguments.
Syntax
Math.atan2(y, x)
Returns
An implementation-dependent approximation of the arctangent of y/x, in radians.
Usage
This function returns an implementation-dependent approximation to the arctangent of the quotient, y/x, of the arguments y and x, where the signs of the arguments are used to determine the quadrant of the result. It is intentional and traditional for the two-argument arctangent function that the argument named y be first and the argument named x be second. The return value is expressed in radians and ranges from -pi to +pi.
Example
This example finds the roof angle necessary for a house with an attic ceiling of 8 feet (at the roof peak) and a 16-foot span from the outside wall to the center of the house. The Math.atan2() function returns the angle in radians; it is multiplied by 180/PI to convert it to degrees. Compare the example in the discussion of Math.atan() Method to understand how the two arctangent functions differ. Both examples return the same value.
function RoofBtn2_Click ()
{
var height = 8;
var span = 16;
var angle = Math.atan2(span, height)*(180/Math.PI);TheApplication().RaiseErrorText("The angle is " +
Clib.rsprintf("%5.2f", angle) + " degrees.")
}See Also
Math.acos() Method, Math.asin() Method, Math.atan() Method, Math.cos() Method, Math.sin() Method, and Math.tan() Method
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Siebel eScript Language Reference Published: 18 April 2003 |