I'm trying to recover a standard user's password on Mac. I'm using OSX Sierra. Using the admin, can I view this password? Either with Terminal or otherwise?
Nope is the general prognosis for this.
Assign them a new password if you don’t intend to crack / reverse engineer the password or hope to find it stored in a plan text file.
If you just need to get at the files and not crack to get at the user keychain, use the system preferences and an admin account to make a new password for the user account in question.