Chapter 11: Problem 93
Give the equations for the coordinate conversion from rectangular to cylindrical coordinates and vice versa.
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Chapter 11: Problem 93
Give the equations for the coordinate conversion from rectangular to cylindrical coordinates and vice versa.
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Find the distance between the point and the line given by the set of parametric equations.\((1,-2,4) ; \quad x=2 t, \quad y=t-3, \quad z=2 t+2\)
Find the point of intersection of the plane \(3 x-y+4 z=7\) and the line through \((5,4,-3)\) that is perpendicular to this plane.
Find the distance between the point and the line given by the set of parametric equations.\((-2,1,3) ; \quad x=1-t, \quad y=2+t, \quad z=-2 t\)
Work A toy wagon is pulled by exerting a force of 25 pounds on a handle that makes a \(20^{\circ}\) angle with the horizontal (see figure in left column). Find the work done in pulling the wagon 50 feet.
Revenue The vector \(\mathbf{u}=\langle 3240,1450,2235\rangle\) gives the numbers of hamburgers, chicken sandwiches, and cheeseburgers, respectively, sold at a fast-food restaurant in one week. The vector \(\mathbf{v}=\langle 1.35,2.65,1.85\rangle\) gives the prices (in dollars) per unit for the three food items. Find the dot product \(\mathbf{u} \cdot \mathbf{v}\), and explain what information it gives.
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