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Rombus
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Homework Statement
Show that the vector fields A = ar(sin2θ)/r2+2aθ(sinθ)/r2 and B = rcosθar+raθ are everywhere parallel to each other.
Homework Equations
[itex]\mathbf{A} \cdot \mathbf{B} = |\mathbf{A}||\mathbf{B}|\cos(0)[/itex]
The Attempt at a Solution
So, if the dot product equals 1. They should be parallel correct?
A={sin(2θ)/(r2),2(sin(θ)/r2),0}
B={rcos(θ),r,0}
if this is the dot product how do I determine the angle between the vectors?
(2 Sin(θ))/r + (Cos(θ) Sin(2 θ))/r
Do i need to transform to rectangular coordinates?
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