YouTipNumber Atan
# Java atan() Method
[Java Number Class](#)
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The atan() method is used to return the arctangent of a specified double-type argument.
### Syntax
double atan(double d)
### Parameters
* **d** -- Any primitive data type.
### Return Value
Returns the arctangent of the specified double-type argument.
### Example
public class Test{ public static void main(String args[]){double degrees = 45.0;double radians = Math.toRadians(degrees);System.out.format("The value of pi is %.4f%n", Math.PI);System.out.format("The arctangent of %.4f is %.4f degrees %n", Math.cos(radians), Math.toDegrees(Math.atan(Math.sin(radians))));}}
Compile the above program, the output result is:
The value of pi is 3.1416The arctangent of 0.7071 is 35.2644 degrees
* * Java Number Class](#)