Formatting answer

[vedantsingh100]

When I type in tan(-60) on my hp prime i get an answer in terms of decimals(-1.732...) how do I change the format of this answer so its in terms of roots(-√(3). Also when i do the logb998(999999)(random example) I don't get a decimal answer, instead i get it in terms of LN. I'm just having issues with converting answers into the correct form that I need. Thanks in advance.