1. The problem statement, all variables and given/known data Find the slope of the tangent line to the give polar curve at the point specified by the value of theta R = 1/θ, θ = π 2. Relevant equations Slope of a polar equation is (dR/dθsinθ+Rcosθ/dR/dθcosθ-Rsinθ) 3. The attempt at a solution Using my calculator, I plugged π for θ, -.101 for DR/Dtheta (after differentiating R) and R = 1/π I got π/12 as my answer, but the correct answer is -π. Why am I off by a factor of 12?