Board Thread:Naruto Discussions/@comment-9782468-20140811214915/@comment-4271790-20140812051157

Too simply answer your question, @AsianReaper, Kakashi was able to use Chidori and Rasengan before getting the Sharingan. As you've already realized, the link you put did not explicitly state that Kakashi copied the Rasengan with his Sharingan. So there.