Tilted disks Let S be the disk enclosed by the curve C: r(t) = 〈cos ϕ cos t, sin t, sin ϕ cos t〉, for 0 ≤ t ≤ 2p, where 0 ≤ ϕ ≤ p/2 is a fixed angle.
32. Use Stokes’ Theorem and a surface
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