Homework Statement
Find the arc length of the curve r=4/θ, for ∏/2 ≤ θ ≤ ∏
Homework Equations
L= ∫ ds = ∫ √(r^2 + (dr/dθ)^2) dθ
The Attempt at a Solution
After some calculations, and letting θ = tanx, I now have to find ∫ ((secx)^3/(tanx)^2). I am not sure how to do this, but i...