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Problems in Mathematical Analysis.pdf - pwp.net.ipl.pt

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252_Mult<strong>ipl</strong>e and L<strong>in</strong>e Integrals_(Ch. 7<br />

2155. Evaluate the double <strong>in</strong>tegral<br />

(S)<br />

dxdy<br />

/25=5 f<br />

where S is the area of a circle of radius a, which circle is tan-<br />

gent to the coord<strong>in</strong>ate axes and lies <strong>in</strong> the first quadrant.<br />

2156*. Evaluate the double <strong>in</strong>tegral<br />

^ydxdy,<br />

(S)<br />

where the region S is bounded by<br />

of the cycloid<br />

x = R(t s<strong>in</strong>/),<br />

y = R(\ cos/).<br />

2157. Evaluate the double <strong>in</strong>tegral<br />

(S)<br />

the axis of abscissas and an<br />

<strong>in</strong> which the region of <strong>in</strong>tegration S is bounded by the coord<strong>in</strong>ate<br />

axes and an arc of the astroid<br />

2158. F<strong>in</strong>d the mean value of the function f(x, y)=--xy 2<br />

<strong>in</strong> the<br />

region SJO^Jt^l, 0

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