Suppose
u=rcos(wt)i+rsin(wt)j where r and w are constants, find the vector velocity
Since "U= r*cos(W*t)i + r*sin(W*t)j" it implies that the velocity is "\\frac{du}{dt}" that is
"\\frac{du}{dt}=r*\\frac{d(cos(W*t ))}{dt}i+r*\\frac{d(sin(W*t))}{dt}j"
This implies
Hence,
Which happens to be the vector velocity.
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