What is atan() in Dart?
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The atan() function returns the inverse tangent of a number. To be more specific, it returns the inverse tangent of a number in radians.
Figure 1 shows the mathematical representation of the atan() function:
Note:
dart:mathis required for this function.
To convert radians to degrees, use the following formula:
degrees = radians * ( 180.0 / pi )
Syntax
double atan(double num)
Parameter
This function requires a number as a parameter.
Return value
atan() returns the inverse tangent of a number (radians) that is sent as a parameter.
The return value lies in interval
[-pi/2,pi/2]radians.
Example
import 'dart:convert';import 'dart:math';void main() {//positive number in radiansprint("The value of atan(0.5): ${atan(0.5)} Radians");// negative number in radiansprint("The value of atan(-0.5): ${atan(-0.5)} Radians");//applying acos() and then converting the result in radians to degrees// radians = 1.0// PI = 3.14159265double result=atan(1.0) * (180.0 / pi);print("The value of atan(1.0): ${result} Degrees");}
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