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This document explores fundamental concepts in geometry, focusing on calculating the area of a circle and the volume of a sphere. It highlights the use of parametric equations for the area of an ellipse and includes a discussion on arc length. Additionally, it presents the catenary curve formed by a suspended cable between two towers, detailing its mathematical representation and properties. The document emphasizes the importance of substitution methods in calculus-based applications to derive limits and calculate surfaces and volumes effectively.
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The Rings of the Lord r w/2 R
The Rings of the Lord • Volume = r w/2 R
Volume = r w/2 R
A cable of length l is suspended between two towers of equal height a distance 2d apart, so that it sags a distance h in the centre. • The curve formed by a suspended rope or cable is called a catenary. Using a coordinate system with the lowest point of the catenary at the origin, it can be described by the equation • where a is a constant