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Thomas Calculus 13th [Solutions]

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Chapter 1 Practice Exercises 49<br />

55.<br />

56.<br />

period<br />

period 4<br />

57.<br />

58.<br />

period 2<br />

period 4<br />

59.<br />

60.<br />

period 2<br />

period 2<br />

61. (a)<br />

(b)<br />

sin B sin b b b 2sin<br />

3 c 2 3<br />

2 2 2 2 2<br />

a b c a c b 4 3 1.<br />

3<br />

3 2<br />

3<br />

2 3. By the theorem of Pythagoras,<br />

2<br />

sin B sin b 2 2 2<br />

3 c c<br />

c 4 . Thus, 2 2<br />

a c b<br />

sin<br />

3<br />

4<br />

3<br />

2<br />

2<br />

(2) 4 2<br />

3 . 3<br />

62. (a) sin A a sin<br />

c<br />

a c A (b) tan A a a b<br />

b<br />

tan A<br />

63. (a)<br />

tan B b b<br />

a<br />

a tan B<br />

(b)<br />

sin A a c a<br />

c sin A<br />

64. (a) sin A a<br />

c<br />

(b)<br />

sin A<br />

a<br />

c<br />

2 2<br />

c b<br />

c<br />

Copyright<br />

2014 Pearson Education, Inc.

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