- #1
hangainlover
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Homework Statement
x^2+y^2=1
Homework Equations
length of curve square root (1+(dx/dy)^2)dy or square root ((dx/dt)^2 + (dy/dt)^2) dt
3. The Attempt at a Solution [/b
I isolated y and got y= square root (1-x^2)
finding dy/dx = -x/square root (1-x^2)
i plugged that into the formula but i did not get the correct answer.
im aware that if i do integral of square root (1+ (dy/dx)^2 ) i have to do imporper integral as i get undefined for denominator at x=-1,1 so what should i do
we all know that answer should be 2pi