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November 01, 2025, 03:17:20 pm
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Author Topic: Vectors question  (Read 599 times)  Share 

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RedCapsicum

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Vectors question
« on: February 16, 2014, 09:56:55 am »
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This is probably a really easy question but I just can't seem to get the answer.
Please help!

The question is attached and it's question 11

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RKTR

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Re: Vectors question
« Reply #1 on: February 16, 2014, 11:19:08 am »
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then you do (|a+b|)^2=|a|^2+|b|^2-2|a||b| cos120
                     (|a+b|)^2=25+16-40cos120
                     (|a+b|)^2 =61
                      |a+b| =root61
« Last Edit: February 16, 2014, 11:26:00 am by RKTR »
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