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What does "Give your numerical values to better than 1% accuracy" mean? watch

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    I have trivial question calculating unit vetcors for some given vectors, and the final sentence is:

    Give your numerical values to better than 1% accuracy

    Now this comes up from time to time and I've never had a clear explanation as to what is required:

    so the surd form to my answer is:

    2/sqrt(8) i + 2/sqrt(8) j

    but 1% to me means: 0.71i + 0.71j - but *better than* implies to an order of magnitude one less again??

    Thanks for any help in advance.
 
 
 
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Updated: October 22, 2015
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