how to find two vectors that make an angle of 60(adsbygoogle = window.adsbygoogle || []).push({}); ^{O}with v=<3,4>??

can i let b=<x,y>, then

cos60=(3x+4y)/5sqrt(x^{2}+y^{2})

5sqrt(x^{2}+y^{2})=3x+4y

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# Angle between vectors

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