solve([tan(x) + tan(2*x) - tan(3*x) == 0], x, to_poly_solve='force')
Getting empty list in output. How to solve this?

1 | initial version |

solve([tan(x) + tan(2*x) - tan(3*x) == 0], x, to_poly_solve='force')
Getting empty list in output. How to solve this?

The following code

`sage: solve([tan(x) + `~~tan(2~~*x) **tan(2*x) - *~~tan(3~~x) tan(3*x) == 0], x, to_poly_solve='force')
~~Getting ~~

outputs an empty ~~list in output. ~~list. How to solve this?

The following code

```
sage: solve([tan(x) + tan(2*x) - tan(3*x) == 0], x, to_poly_solve='force')
```

outputs an empty list. How to solve this?

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