29.06.2016 Views

Thomas Calculus 13th [Solutions]

  • No tags were found...

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Section 3.8 Derivatives of Inverse Functions and Logarithms 175<br />

55. ln(cos 2 ) dy<br />

y<br />

1<br />

d<br />

2cos ( sin ) 2 tan<br />

2<br />

cos<br />

dy<br />

56. y ln(3 e ) ln 3 ln ln e ln 3 ln 1 1<br />

d<br />

t t dy<br />

57. y ln(3 te ) ln 3 ln t ln e ln 3 ln t t 1 1 1 t<br />

dt t t<br />

58.<br />

t<br />

t<br />

y ln(2e sin t) ln 2 ln e ln sin t ln 2 t ln sin t<br />

dy<br />

1 1 d (sin t) 1 cost cost sin t<br />

dt sin t dt sin t sin t<br />

59. y ln e ln e ln(1 e ) ln(1 e dy<br />

) 1 1 d (1 ) 1 e 1<br />

1 e d 1 e d<br />

e 1 e 1 e<br />

60.<br />

y<br />

dy<br />

ln ln ln 1 1 d 1 d 1<br />

1 d d 1 d<br />

1<br />

1 1 1 1 1 1<br />

1/2<br />

2 1 2 2 1 2 1 2 (1 )<br />

61.<br />

62.<br />

y e (cos t ln t) e cost e ln t te cost dy cost cost d<br />

cost<br />

(cos ) (1 sin )<br />

dt<br />

e te dt<br />

t t t e<br />

sin t 2 dy sin t 2 2 sin t sin t 2<br />

y e (ln t 1) e (cos t)(ln t 1) e e (ln t 1)(cos t)<br />

2<br />

dt t t<br />

y<br />

63. ln sin 1 y y<br />

( )(sin ) cos 1 y y<br />

y e x y y e x e x y e sin x e cos x<br />

y<br />

y<br />

y<br />

1 ye sin x y<br />

ye cos x<br />

y e cos x y<br />

y y<br />

1 ye sin x<br />

y<br />

64. ln xy e x y ln x ln y e x y 1 1 y (1 y ) e x y y 1 e x y e<br />

x y 1<br />

x y y x<br />

y<br />

x y x y<br />

1 ye<br />

x y<br />

xe 1 y( xe 1)<br />

y<br />

y x x y<br />

x(1 ye )<br />

y x y x<br />

65. ln ln ln ln 1 ln 1<br />

y<br />

x y x y y x x y y y x x y (1) ln y ln x y x y ln y<br />

x y y x<br />

y<br />

y<br />

ln 2<br />

x ln ln<br />

x<br />

2<br />

ln x ln<br />

ln<br />

y<br />

xy x x<br />

y xy y y y x y y<br />

x y x x<br />

66.<br />

x<br />

2 x<br />

tan y e ln x (sec y)<br />

y e 1 y<br />

x<br />

x<br />

2<br />

( xe 1)cos y<br />

x<br />

x x<br />

67. y 2 y 2 ln 2<br />

68. y 3 x y 3 x (ln 3)( 1) 3 x ln 3<br />

69.<br />

y<br />

s dy s 1 1/2<br />

5 5 (ln 5) ln 5 s<br />

s<br />

5<br />

ds<br />

2 2 s<br />

Copyright<br />

2014 Pearson Education, Inc.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!