```
solve(tan(3*x)==1, x, to_poly_solve='force', explicit_solutions=True)
```

fails to produce answers while

```
solve(sin(3*x)==1, x, to_poly_solve='force', explicit_solutions=True)
```

works as expected

1 | initial version |

```
solve(tan(3*x)==1, x, to_poly_solve='force', explicit_solutions=True)
```

fails to produce answers while

```
solve(sin(3*x)==1, x, to_poly_solve='force', explicit_solutions=True)
```

works as expected

2 | No.2 Revision |

```
solve(tan(3*x)==1, x, to_poly_solve='force', explicit_solutions=True)
```

fails to produce answers while

```
solve(sin(3*x)==1, x, to_poly_solve='force', explicit_solutions=True)
```

works as expected

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