каковы результаты — what are the facts?
каков он собой? — what does he look like?
я тебе расскажу, каковы эти люди — I'll tell you what kind of people they are
каков он есть — such as he is
каков! — just look (at him)!; how do you like him!
каков бы ни был — whatever / no matter what smb. / smth. may be