# Getting the cos, sin or tan or a number

```The hypotenuse is the longest side across from the right angle.

b
/|
/ |
hypotenuse /  | opposite
/   |
/    |
a ------- c

sin of a = bc / ab = opposite / hypotenuse
cos of a = ac / ab = adjacent / hypotenuse
tan of a = bc / ac = opposite / adjacent
```

In Java, you can use the static methos in the Math class to determine the sin, cos and tan of an angle.
Here’s an example:

```import java.math.*;

public class Main
{
public static void main(String args[]) throws Exception {
double angle = 0.23456;

double sinAngle = Math.sin(angle);
double cosAngle = Math.cos(angle);
double tanAngle = Math.tan(angle);

System.out.println("sin of " + angle + ": " + sinAngle);
System.out.println("cos of " + angle + ": " + cosAngle);
System.out.println("tan of " + angle + ": " + tanAngle);
}
}
```

outputs:

```sin of 0.68: 0.6287930240184686
cos of 0.68: 0.7775727187509279
tan of 0.68: 0.8086613751425653
```

Note: angles to the trigonometric math methods should be given in radians.
If you want to use degrees, you have to convert the radians first:

```     360 degrees = 2 pi radians

So, to convert radians into degrees, multiply by 180 / Math.PI
to convert degrees into radians, multiply by Math.PI / 180
```