I forget the password of protecting sheet, I need to unprotect it

[khalid]

That sheet has hidden columns and I need to unhide them because they contain
formulas which I forget them as well. The sheet is protected with a password.
Is there any way to recall the password or even view the formulas?
Thanks

 

[JLatham]

Many people find the tool available through the link below to work great for
this kind of thing:
http://www.straxx.com/excel/password.html

also J E McGimpsey has code and add-ins available through this page:
http://www.mcgimpsey.com/excel/removepwords.html