Can someone fact check this for me? Here is the link to the PDF. In example #3, I literally cannot make the numbers come out the way the answer is given. I found two major mistakes, but I may be wrong:
1) I found Point Q = (3,0,0) NOT the given (1,0,0)
I worked the problem with both, and found the answer with (3,0,0) = 1/sqrt(6). With (1,0,0) = 3/sqrt(6).
2) Their math on the final step of the equation just doesn't make sense. Is it an error?

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Hey. Can you repost the link and I'll see if I can help. It doesn't seem to be in the original post.

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