.tan()

The Math.tan() method returns the tangent of an angle given in radians. The function accepts all real numbers except the values where cos(x) is equal to zero.

Math.tan(double x)

Here, x is the argument passed to the function. Math.tan() accepts all real numbers as arguments.

• If the argument is NaN or an infinity, then the result returned is NaN.
• If the argument is zero, then the result is also zero with same sign.

This example uses .tan() to return the tangent for (x):

// Main.java

public class Main {
  public static void main(String[] args) {
    double x = Math.PI / 2.0;    // Radians
    System.out.println(Math.tan(x));

    x = 0.0;
    System.out.println(Math.tan(x));
  }
}

This will produce the following output:

1.6197751905438615
0.0