Coordinate transformation of the Navier Stokes equation

hcpysicist
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Homework Statement
Given navier stokes equation in certisian form ,it is asked to use coordinate transformation equation to derive navier stokes equation in cylindrical coordinates .
Relevant Equations
x=rcos(theta),
y=rsin(theta)
z=z
i have successfully transformed the continuity equation using coordinate transform,but having trouble with the momentum equation .
1702232831115.png

can someone kindly provide the transformation of the right hand sight of equation of the image i have attached.
 
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