In Exercises 41 46, (a) find symmetric equations of the tangent line to the curve of
Chapter 13, Problem 41(choose chapter or problem)
In Exercises 41 46, (a) find symmetric equations of the tangent line to the curve of intersection of the surfaces at the given point, and (b) find the cosine of the angle between the gradient vectors at this point. State whether or not the surfaces are orthogonal at the point of intersection.
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