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martinbandung
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Homework Statement
Find electric field at Point A
its an arc with uniform density= lamda
https://drive.google.com/file/d/14cBqE2dMe_w0nb9LtPG0h1cUOrzGWt6g/view?usp=sharing
the problem
Homework Equations
E=intergal dq/r^2
The Attempt at a Solution
I've tried using wolfram and cosine rule to determine the distance from the arc to point A
but it give imaginary result