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Thomas Calculus 13th [Solutions]

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1128 Chapter 15 Multiple Integrals<br />

40. (a)<br />

(c)<br />

2<br />

/2 3/ 2 9 r<br />

dz r dr d (b)<br />

0 0 r<br />

/2 /4 3 2<br />

sin<br />

0 0 r<br />

/2 /4 3 2 /2 /4 /2<br />

9 2 2<br />

sin d d d 9 sin d d 9 1 1 d<br />

0 0 0 0 0 0 2<br />

4<br />

d d d<br />

41. (a)<br />

(c)<br />

(d)<br />

2 /3 2 2<br />

V sin d d d<br />

0 0 sec<br />

V<br />

2 2 2<br />

3 3 x 4 x y<br />

2 dz dy dx<br />

3 3 x 1<br />

(b)<br />

V<br />

2 3 4<br />

0 0 1<br />

V<br />

2<br />

3/2 3<br />

2 3 2<br />

1/2<br />

2 4 r<br />

2 2<br />

3/2<br />

r 4 r r dr d r d 1 3 4<br />

0 0 0 3 2 0 3 2 3<br />

d<br />

0<br />

5<br />

2<br />

d 5<br />

6 0 3<br />

r<br />

2<br />

dz r dr d<br />

42. (a)<br />

(b)<br />

(c)<br />

2<br />

Iz<br />

2 1 1 r<br />

0 0 0<br />

2<br />

r dz r dr d<br />

Iz<br />

2 /2 1<br />

0 0 0<br />

2 2<br />

sin<br />

2<br />

sin d d d ,<br />

2<br />

since r<br />

2<br />

x<br />

2<br />

y<br />

2 2<br />

sin<br />

2<br />

cos<br />

2 2<br />

sin<br />

2<br />

sin<br />

2<br />

sin<br />

2 /2<br />

2 /2<br />

1 3<br />

1<br />

2 sin cos 2<br />

/2<br />

2<br />

2 /2<br />

Iz<br />

sin d d sin d d cos d<br />

0 0 5 5 0 3 3 0 15 0<br />

0<br />

0<br />

2 (2 ) 4<br />

15 15<br />

43.<br />

2<br />

4 /2 1 4 4 r<br />

/2 1 3 5 /2<br />

5 1<br />

/2<br />

V 8<br />

4 dz r dr d<br />

0 0 1 4 0 0 5 r 4 r r dr d<br />

r<br />

4 0 2 1 d<br />

6 4 d<br />

0 3<br />

44.<br />

1<br />

/2 1 1 r<br />

/2 1 2 2 /2 2 3<br />

2<br />

3/2<br />

V 4 1<br />

2 dz r dr d 4 r r r 1 r dr d 4 r r 1 r d<br />

0 0 1 r<br />

0 0 0 2 3 3<br />

0<br />

/2<br />

1 1 1<br />

/2<br />

4 d 2 d 2<br />

0 2 3 3 0<br />

2<br />

45.<br />

46.<br />

V<br />

2 3cos r sin 2 3cos 2 2<br />

dz r dr d r sin dr d<br />

3 /2 0 0 3 /2 0 3 /2<br />

3<br />

9cos (sin ) d<br />

4<br />

2<br />

9 cos 9 0 9<br />

4 3 /2 4 4<br />

V 2 3cos r<br />

3cos 2<br />

dz r dr d 2<br />

/2 0 0 r dr d<br />

/2 0 3 /2<br />

27 cos 3<br />

d<br />

2<br />

18 cos sin 2<br />

3 3 /2<br />

cos d 12 sin /2<br />

12<br />

/2<br />

Copyright<br />

2014 Pearson Education, Inc.

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