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Thomas Calculus 13th [Solutions]

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824 Chapter 11 Parametric Equations and Polar Coordinates<br />

52.<br />

2 2 2 3 1 3 1<br />

3 3 3 2 2 2 2<br />

r sin 5 r sin cos cos sin 5 r cos r sin 5 x y 5<br />

3x y 10, line with slope m 3 and intercept b 10<br />

53. x 7 r cos 7<br />

54. y 1 r sin 1<br />

55.<br />

57.<br />

x y r cos r sin<br />

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

2 2 2<br />

x y 4 r 4 r 2 or r 2<br />

4<br />

58.<br />

2 2 2 2 2 2 2 2 2 2<br />

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

59.<br />

60.<br />

2<br />

2<br />

x y<br />

2 2 2 2 2 2<br />

x y r r<br />

9 4<br />

1 4 9 36 4 cos 9 sin 36<br />

2 2 2<br />

xy 2 ( r cos )( r sin ) 2 r cos sin 2 2r cos sin 4 r sin 2 4<br />

61.<br />

2 2 2 2<br />

y 4x r sin 4r cos r sin 4cos<br />

62.<br />

2 2 2 2 2 2 2<br />

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

63.<br />

2 2 2 2 2 2 2<br />

x ( y 2) 4 x y 4y 4 4 x y 4y r 4r sin r 4sin<br />

64.<br />

2 2 2 2 2 2 2<br />

( x 5) y 25 x 10x 25 y 25 x y 10x r 10r cos r 10cos<br />

65.<br />

2 2 2 2 2 2 2<br />

( x 3) ( y 1) 4 x 6x 9 y 2y 1 4 x y 6x 2y 6 r 6r cos 2r<br />

sin 6<br />

66.<br />

2 2 2 2 2 2<br />

( x 2) ( y 5) 16 x 4x 4 y 10y 25 16 x y 4x 10y<br />

13<br />

2<br />

r 4r cos 10r<br />

sin 13<br />

67. (0, ) where is any angle<br />

68. (a)<br />

(b)<br />

a<br />

cos<br />

b<br />

sin<br />

x a r cos a r r a sec<br />

y b r sin b r r b csc<br />

Copyright<br />

2014 Pearson Education, Inc.

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