Transformation from Cartesian to spherical polar coordinates

[andrey21]

Transformation from Cartesian to spherical polar coordinates

In dimensions:

x=r sinθ cos \varphi and y= r sin θ sin \varphi z=r cos θ

Show one example of:

∂z^\alpha/ ∂x^μ . ∂x^μ/ ∂z^\alpha = δ^\alpha_\beta

Now here is my answer:

δ^y_x=(∂y/∂r . ∂r/∂x) + (∂y/∂θ . ∂θ/∂x) + (∂y/∂\varphi . ∂\varphi/∂x)



Is this correct? If not where have I made an error... Thank you

 

[andrey21]

Just like to pick up in this old thread, still having trouble with the question.

Using what I have already done:

δ^r_θ=(∂r/∂x . ∂x/∂θ) + (∂r/∂y . ∂y/∂θ) + (∂r/∂z . ∂z/∂θ) (1)

Where:

x=r sin θ cos φ and y= r sin θ sin φ z= r cos θ

Would (1) then become:

δyx= = ((sin θ cos φ) . ( r cos θ cos φ)) + ((sin θ sin φ) . (cos θ sin φ)) + ((cos θ) . (-r sin θ))

Then multiply out the brackets and simplify