nah bro it depends on perspective it's not always the case that you use sin with y-axis. look at the triangle the dE, the dE-y and the dE-x are making. in order to get the dE-y, the perpendicular in that particular triangle, you gotta multiply dE with cos. if you do it with sin you are gonna get dE-x instead which is the base in that particular triangle.
What if it doesn't have symmetry?!
3:16 what i know is when we are dealing with y axis we should use sin , sir why did u use cos i didint understand
nah bro it depends on perspective it's not always the case that you use sin with y-axis. look at the triangle the dE, the dE-y and the dE-x are making. in order to get the dE-y, the perpendicular in that particular triangle, you gotta multiply dE with cos. if you do it with sin you are gonna get dE-x instead which is the base in that particular triangle.
@@FuruyaTakeshi-jx2kz not gonna read all of that i passed the course
I think its just x, not (L/2-x), right, because the integral would be different, right?
Great video sir
Great video sir