Gets the inverse tangent of an angle.
| Parameter |
Description |
value |
The tangent of an angle; that is, the ratio
of the adjacent side to the opposite side. See below for special cases. |
| Return value |
Description |
double |
The inverse tangent of the parameter in radians.
See rad (JavaScript) to
convert degrees to radians. |
Usage
Special cases are as follows:
- The inverse tangent of
NaN is NaN.
- The inverse tangent of
+0 is positive zero.
- The inverse tangent of
-0 is negative zero.
Examples
This button
onclick event
calculates an angle in degrees of a right triangle given the length
of the adjacent side and the length of the opposite side.
sessionScope.angleA =
Math.deg(Math.atan(sessionScope.a / sessionScope.b))