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Here's is another question and solution from the same set as my previous question. This looks like another mistake in the solution to me. I have marked it with the green arrow. This is a typo right? Surely there should be no minus sign here?

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enter image description here

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up vote 4 down vote accepted

$\hskip 1.2in$ clockwise


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Yea I just noticed that now myself. We never did one clockwise example in class so never even thought to look out for it. – Jim_CS Apr 9 '12 at 8:53

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