Cross Product in 3D Cylindrical or Spherical coordinates












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When i take a cross product of two vectors (Cylinder base in x,y plane) for example d(phi)cross d(z), how do i know if the resultant Vector protrudes out of the page or goes inside? I know the right hand rule but in terms of Cylinder and Spheres its hard to implement. This might be a very basic question but non the less it is very important for the Integrals of Surfaces.



I would be very thankful to know if you have any tips or tricks to understand the normal vectors in 3 dimensions.










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  • $begingroup$
    If you have two vectors in cylindrical coordinates with components $(r_1 , varphi_1 , z_1)$ and $(r_2 , varphi_2 , z_2)$, their cross product has $z$ component $r_1 r_2 sin(varphi_2 - varphi_1)$. In spherical coordinates, how is the "page plane" defined?
    $endgroup$
    – Nominal Animal
    Dec 12 '18 at 20:52


















0












$begingroup$


When i take a cross product of two vectors (Cylinder base in x,y plane) for example d(phi)cross d(z), how do i know if the resultant Vector protrudes out of the page or goes inside? I know the right hand rule but in terms of Cylinder and Spheres its hard to implement. This might be a very basic question but non the less it is very important for the Integrals of Surfaces.



I would be very thankful to know if you have any tips or tricks to understand the normal vectors in 3 dimensions.










share|cite|improve this question









$endgroup$












  • $begingroup$
    If you have two vectors in cylindrical coordinates with components $(r_1 , varphi_1 , z_1)$ and $(r_2 , varphi_2 , z_2)$, their cross product has $z$ component $r_1 r_2 sin(varphi_2 - varphi_1)$. In spherical coordinates, how is the "page plane" defined?
    $endgroup$
    – Nominal Animal
    Dec 12 '18 at 20:52
















0












0








0





$begingroup$


When i take a cross product of two vectors (Cylinder base in x,y plane) for example d(phi)cross d(z), how do i know if the resultant Vector protrudes out of the page or goes inside? I know the right hand rule but in terms of Cylinder and Spheres its hard to implement. This might be a very basic question but non the less it is very important for the Integrals of Surfaces.



I would be very thankful to know if you have any tips or tricks to understand the normal vectors in 3 dimensions.










share|cite|improve this question









$endgroup$




When i take a cross product of two vectors (Cylinder base in x,y plane) for example d(phi)cross d(z), how do i know if the resultant Vector protrudes out of the page or goes inside? I know the right hand rule but in terms of Cylinder and Spheres its hard to implement. This might be a very basic question but non the less it is very important for the Integrals of Surfaces.



I would be very thankful to know if you have any tips or tricks to understand the normal vectors in 3 dimensions.







integration vectors surfaces cross-product






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share|cite|improve this question











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asked Dec 11 '18 at 11:13









Sherlock HomiesSherlock Homies

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18513












  • $begingroup$
    If you have two vectors in cylindrical coordinates with components $(r_1 , varphi_1 , z_1)$ and $(r_2 , varphi_2 , z_2)$, their cross product has $z$ component $r_1 r_2 sin(varphi_2 - varphi_1)$. In spherical coordinates, how is the "page plane" defined?
    $endgroup$
    – Nominal Animal
    Dec 12 '18 at 20:52




















  • $begingroup$
    If you have two vectors in cylindrical coordinates with components $(r_1 , varphi_1 , z_1)$ and $(r_2 , varphi_2 , z_2)$, their cross product has $z$ component $r_1 r_2 sin(varphi_2 - varphi_1)$. In spherical coordinates, how is the "page plane" defined?
    $endgroup$
    – Nominal Animal
    Dec 12 '18 at 20:52


















$begingroup$
If you have two vectors in cylindrical coordinates with components $(r_1 , varphi_1 , z_1)$ and $(r_2 , varphi_2 , z_2)$, their cross product has $z$ component $r_1 r_2 sin(varphi_2 - varphi_1)$. In spherical coordinates, how is the "page plane" defined?
$endgroup$
– Nominal Animal
Dec 12 '18 at 20:52






$begingroup$
If you have two vectors in cylindrical coordinates with components $(r_1 , varphi_1 , z_1)$ and $(r_2 , varphi_2 , z_2)$, their cross product has $z$ component $r_1 r_2 sin(varphi_2 - varphi_1)$. In spherical coordinates, how is the "page plane" defined?
$endgroup$
– Nominal Animal
Dec 12 '18 at 20:52












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