Assignment:
A torus of radius 10 (and cross-sectional radius 1) can be represented parametrically by the function r : --> R3
r(θ, Φ) = ((10 + cosΦ) cosθ, (10+ cosΦ)sinθ , sinΦ)
where D is the rectangle given by 0 ≤ θ ≤ 2π , 0 ≤ Φ ≤2π.
The surface area of the torus is
Provide complete and step by step solution for the question and show calculations and use formulas.