- #1
FlyingButtress
- 6
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Homework Statement
Question:[/B]
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And the answer in the solution manual:
Homework Equations
Trig sub? [tex]a^2/x^2 = tan(θ) [/tex]
I'm thinking x>>a would affect this majorly and I'm not seeing how.
The Attempt at a Solution
I understand the concept behind this (I think), but part c is killing me right now. I have no idea how the inverse square root turns into the final equation. Maybe I should have posted this in Calculus, but I have no recollection of learning this in calc I/II, nor physics I/II so I didn't know where to post.
The [tex]a^2/x^2[/tex] looks eerily similar to a trig sub problem, but I don't see how that would work because there's no integral.
For [tex]E_x,[/tex] I was able to set the limit of a to 0 to get the point charge equation. The solution manual didn't do it this way but it worked for me to get the point charge equation.
BTW I already have a) and b), which were pretty straightforward.
Could someone point me in the right direction please? Thank you!