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I have magnitude and angle how can find a b and a Dot b a 3 angle 45 b 5 angle 90 Find A B A dot B?
Mohammedalotibigp654...
a = 3/sqrt(2)*i + 3/sqrt(2)*j
b = 5j
a.b = |a|*|b|*cos(q)
= 3*5*cos(45) = 15/sqrt(2)
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∙ 10y ago
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