Consider U = {(u¹, u²) € R² | u¹, u² € (-7, π)} and define 1. Compute tangent vectors X¹, X₁² and normal vector n. 2. Sh
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Consider U = {(u¹, u²) € R² | u¹, u² € (-7, π)} and define 1. Compute tangent vectors X¹, X₁² and normal vector n. 2. Show X (U) is a regular surface in R³. X (u¹, u²) = ((2 + cos u¹) cos u², (2 + cos u¹) sin u², sin u¹)