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so I have a semi circle that goes from

[tex] \frac{5\pi}{4} to \frac{\pi}{4} [/tex]

so the angle between the x axis the radius of the circle is 45 degrees.

I have, letting the radius = a)

[tex] \frac{1}{a} \int \.dl [/tex]

this is going to have an x and y component, I know the x component is 2a in the direction of x, but what about the y component?

[tex] \frac{5\pi}{4} to \frac{\pi}{4} [/tex]

so the angle between the x axis the radius of the circle is 45 degrees.

I have, letting the radius = a)

[tex] \frac{1}{a} \int \.dl [/tex]

this is going to have an x and y component, I know the x component is 2a in the direction of x, but what about the y component?

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