Page Description Equation
522 Green's theorem \[ \int_{C+}{P\dx+Q\dy} =\iint_{D} \left( \frac{\partial Q}{\partial x} -\frac{\partial P}{\partial y} \right) \dx\dy \]
524 area of a region \[ A=\frac{1}{2} \int_{\partial D}{x\dy-y\dx}\\ \text{where }\\ \partial D=C^+ \]