- #1
fishingspree2
- 139
- 0
In my physics textbook we have
[itex]d\vec{l}=\hat{z}dz[/itex]
and then it says
[itex]d\vec{l}\times \hat{R}=\hat{\phi}\sin \left (\theta \right )dz[/itex]
How so? What is [itex]\hat{z}\times\hat{R}[/itex]? If it is [itex]\hat{\phi}[/itex] then where does the sine come from?
[itex]d\vec{l}=\hat{z}dz[/itex]
and then it says
[itex]d\vec{l}\times \hat{R}=\hat{\phi}\sin \left (\theta \right )dz[/itex]
How so? What is [itex]\hat{z}\times\hat{R}[/itex]? If it is [itex]\hat{\phi}[/itex] then where does the sine come from?