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Thomas Calculus 13th [Solutions]

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Section 11.7 Conics in Polar Coordinates 855<br />

45.<br />

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

4 4 4<br />

1 r cos 1 r sin 2 1 x 1 y 2<br />

2 2 2 2<br />

x y 2 y 2 x<br />

46. r cos 3 1 r cos cos 3 sin sin 3 1<br />

4 4 4<br />

2<br />

2<br />

r cos r sin 1 x y 2<br />

2<br />

2<br />

y x 2<br />

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

3 3 3<br />

1 3 1 3<br />

r cos r sin 3 x y 3<br />

2 2 2 2<br />

3<br />

x 3y 6 y x 2 3<br />

3<br />

48.<br />

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

3 3 3<br />

1 3 1 3<br />

r cos r sin 2 x y 2<br />

2 2 2 2<br />

3 4 3<br />

x 3y 4 y x<br />

3 3<br />

49.<br />

2 2<br />

2x 2y 6 2 r cos 2 r sin 6 r cos sin 3 r cos cos sin sin 3<br />

2 2 4 4<br />

r cos 3<br />

4<br />

50.<br />

3<br />

3x y 1 3r cos r sin 1 r cos 1 sin 1 r cos cos sin sin 1<br />

2 2 2 6 6 2<br />

r cos<br />

1<br />

6 2<br />

51.<br />

y 5 r sin 5 r sin 5 r sin( ) 5 r cos ( ) 5 r cos 5<br />

2 2<br />

Copyright<br />

2014 Pearson Education, Inc.

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