Question: In mathematics we can assume that `sin(t1)` is equal to `t1` for very small angles. How to do that in Matlab?

```
syms t1;
res = sin(t1);
res2= MAGIC(res,t1);

```

I need `MAGIC`to change `res`, such that it becomes `t1`.

Thanks

Answer: 
It is `Input` and not `input`.
[This commit](https://github.com/laravel/laravel/commit/2adbbbd91e9d6e2d569cc56f138b7273efe25651) removed `Input` facade definition from `config/app.php` hence you have to manually add that in to `aliases` array as below,

```
'Input' => Illuminate\Support\Facades\Input::class,

```

Or You can import `Input` facade directly as required,

```
use Illuminate\Support\Facades\Input;

```
It's changed in laravel 6. [See for more info here](https://laravel.com/docs/6.x/upgrade#the-input-facade)

Don't do anything in app.php and anywhere else, just replace

input::get() with Request::input()

and

on top where you declare Input,Validator,Hash etc., remove **Input** and add **Request**

use something like :

Config,DB,File,Hash,**Input**,Redirect,Session,View,Validator,**Request**;