How to calcualte equations in Java

To calculate equations in Java, you can use the `Math` class. The `Math` class contains a number of methods that can be used to perform mathematical calculations, such as addition, subtraction, multiplication, and division.

For example, to calculate the sum of two numbers, you can use the `add` method:

​
int x = 5;
int y = 7;
int sum = Math.add(x, y);
​

The `add` method takes two arguments, which are the numbers to be added. The method returns the sum of the two numbers.

You can also use the `Math` class to calculate other mathematical functions, such as sine, cosine, and tangent. For example, to calculate the sine of an angle, you can use the `sin` method:

​
double angle = Math.PI / 4;
double sine = Math.sin(angle);
​

The `sin` method takes one argument, which is the angle in radians. The method returns the sine of the angle.

The `Math` class is a powerful tool for performing mathematical calculations in Java. You can use the `Math` class to calculate a wide variety of mathematical functions.

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