### Simplifying Expressions with Octave

Octave is a high level programming language intended for numerical computations. One of the cool features of this is that with symbolic expressions, you can then simplify mathematical expressions.

## Setup

First install Octave and the symbolic package using the website or your package manager of choice.

Then in octave type in the following code

```
pkg load symbolic
```

## Usage

For every variable not defined earlier in your expression, make sure to declare it as a symbolic data type

`syms x y`

Then make an expression

```
expr = y + sin(x)^2 + cos(x)^2
```

You can then ask Octave to simplify the expression for you

```
simp_expr = simplify(expr)
```

Displaying it shows it as

`(sym) y + 1`

Which is indeed a simplification using a trig identity ðŸ™‚