Volume of Revolution Q1

Volume of Revolution Q1

\(R\) is the finite region in the first quadrant which is bounded by the curve \(\frac{{{x}^{2}}}{{{a}^{2}}}+\frac{{{y}^{2}}}{{{b}^{2}}}=1\) and the line \(\frac{x}{a}+\frac{y}{b}=1\), where \(a>b>0\).

Write down the definite integral representing the area of \(R\) and evaluate this integral using the substitution \(x=a\sin \theta\) in exact form.

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Answer:\(\dfrac{ab}{2}\left(\dfrac{\pi}{2}-1\right)\)

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