Electronic Homework 1 Sections 4.1-4.2 PDF

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precalculus homework with answers...

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Math 1330 Precalculus Electronic Homework (EHW 1) Sections 4.1, 4.2 Work the following problems and choose the correct answer. The problems that refer to the Textbook may be found at www.casa.uh.edu in the Online Textbook under the Exercises link in the appropriate section. Record your answers by logging into your CASA account, go to the EMCF link in the top menu bar, selecting the appropriate assignment in the EMCF menu and recording your choices on the EMCF form. You MUST record your answers by the deadline given. No late homework will be accepted. Supplemental Videos to watch this week:

Watch Geometry videos (2a and 2b) under Help Videos link on CASA: https://online.math.uh.edu/courses/placement/2a.mp4 https://online.math.uh.edu/courses/placement/2b.mp4 It is important to watch these videos to review basic skills you will need in Chapter 4. Section 4.1 1. In right triangle BCD with right angle C, BC= 8 and BD=17. Use the information given to find tan D and sec D.

A. tan D

15 ; 8

sec D

17 15

B. tan D

8 ; 15

sec D

17 15

C. tan D

8 ; 15

sec D

15 17

D. tan D

7 ; 15

sec D

17 8

E. tan D

24 ; 7

sec D

15 24

F.

None of the above

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2.

Section 4.1 Problem 16

6

A.

B.

2 6 4 3

C.

6

D.

E.

4

F. None of the above

3.

Section 4.1 Problem 36 A. sin T

7 ; 9

cos T

7 2 8

B. sin T

9 ; 7

cos T

9 2 8

C. sin T

7 ; 9

cos T

4 2 9

D. sin T

4 2 ; cos T 9

7 9

E. sinT

9 2 ; cosT 8

9 7

F.

None of the above

Section 4.1 Problem 44: Find x and csc E .

4. A.

x = 44;

csc E

44 7

B.

x = 65;

csc E

65 7

C.

x=

22 ;

csc E

11 7

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D.

x = 11 ;

csc E

11 7

E.

x=

65 ;

csc E

65 7

F.

None of the above

5. In triangle ABC, AC =24, the measure of angle A = 30q , and the measure of angle B = 45q . Find the area of this triangle. (Hint: Draw a picture and include the altitude from vertex C to the side AB.)

A.

72 3

D.

24 1  3





B.

54 3

E.

36 1  3









C.

72 1  3

F.

None of the above

6. Triangle ABC is an equilateral triangle with AC =8; find the area of this triangle. (Hint: Draw a picture and include the altitude and mark the measures of each angle.)

A.

32 3

B.

8 3

C.

64

D.

32

E.

16 3

F.

None of the above

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7.

Section 4.2 Problem 12

A.

7S , 6

3S , 2

7S 4

B.

5S , 6

3S , 2

5S 4

C.

7S , 6

3S , 2

5S 3

D.

7S , 6

S,

4S 3

E.

7S , 6

S,

7S 4

F.

None of the above

8.

Section 4.2 Problem 18

A.

40 q,

70q,

318q

B. 20 q,

140 q, 359q

C.

20 q,

70q,

265q

D. 40 q,

140 q, 636 q

E.

20 q,

70 q,

318q

F.

9.

None of the above

Section 4.2 Problem 22

A.

13S 15

B.

D.

35S 72

E.

37S 72 13S 17

C.

F.

4S 17 None of the above

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10.

Section 4.2 Problem 38

A.

13S ft 4

B. 15S ft

C.

D.

30S ft

E. 15 ft

F.

None of the above

C.

20S in

11.

15S ft 2

Section 4.2 Problem 40

A.

125 S2 in 9

B.

D.

20 in

E. 125 in

12.

1 in 20

F. None of the above

Section 4.2 Problem 48

A.

24  21S feet 4

B.

21S feet 4

C.

12  21S feet 4

D.

21S feet 12

E.

288  21S feet 12

F.

None of the above

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13.

Section 4.2 Problem 60 A.

60S cm 2

B. 120 cm

C.

216 cm 2

2 D. 120S cm

E.

10S cm2

F. None of the above

14.

2

Section 4.2 Problem 62

A.

4 feet 3

B.

2 feet 9

C.

4 feet 9

D.

8 feet 3

E.

2 feet 3

F.

None of the above

15.

Section 4.2 Problem 68 (a) and (b). A.

4S radians per second; 176S inches per second

B.

8S radians per second; 44S inches per second

C.

16S radians per second; 176S inches per second

D.

4S radians per second; 88S inches per second

E.

8S radians per second; 88S inches per second

F.

None of the above

This homework has 15 questions; your grade will be out of 15.

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