Let S be the part of the graph z = g(x, y) lying over a domain D in the xy-plane. Let =
Chapter 16, Problem 51(choose chapter or problem)
Let S be the part of the graph z = g(x, y) lying over a domain D in the xy-plane. Let = (x, y) be the angle between the normal to S and the vertical. Prove the formula Area(S) = D dA | cos |
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