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

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254 Mult<strong>ipl</strong>e and L<strong>in</strong>e Integrals (Ch. 7<br />

S<strong>in</strong>ce the coord<strong>in</strong>ate r <strong>in</strong> the region S varies from to 1 for any q>, and q><br />

varies from to 2jt, it follows that<br />

2Jt 1<br />

f f y\x*<br />

Pass to polar coord<strong>in</strong>ates r and cp and set up<br />

the limits of<br />

<strong>in</strong>tegration with respect to the new variables <strong>in</strong> the follow<strong>in</strong>g<br />

<strong>in</strong>tegrals:<br />

2160. K, y)dy. 2161. Jd*$/(]/J<br />

2162. JJ/(x, y)dxdy,<br />

\-'/<br />

where S is a triangle bounded by the straight l<strong>in</strong>es (/ = #, y~ x,<br />

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