Download FINAL EXAM REVIEW TRIGONOMETRY

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts
no text concepts found
Transcript
FINAL EXAM REVIEW TRIGONOMETRY
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Find the exact value of the expression without using a calculator or table.
3
1) cos-1 2
A)
7π
4
B)
π
6
C)
2) arcsec ( 2)
7π
A)
4
C)
1)
π
4
D)
11π
6
2)
3π
4
B)
π
7π
± 2πn, ± 2πn
4
4
D)
π
4
Find the exact value of the expression in degrees without using a calculator or table.
3) csc-1 (2)
B) -30°
A) 60°
C) 420°
Find an equivalent algebraic expression for the composition.
4) cot (arctan (x))
1
B)
A) x
x
Find all real numbers that satisfy the equation.
5) cos x = 1
π
A) x|x = + 2kπ
2
C) x|x = 6) cos 2x = 3)
D) 30°
4)
1
C)
x2
D) x
5)
B) {x|x = π + 2kπ}
3π
+ 2kπ
2
D) {x|x = 0 + 2kπ}
3
2
6)
π
5π
A) x x = + kπ or x = + kπ
6
6
C) x x = π
11π
+ 2kπ or x = + 2kπ
12
12
B) x x = π
+ kπ
12
D) x x = π
11π
+ kπ or x = + kπ
12
12
Find all values of θ in [0°, 360°) that satisfy the equation.
1
7) sin θ = - 2
A) {60°, 300°}
7)
B) {150°, 210°}
C) {210°, 330°}
1
D) {60°, 120°}
Find all real numbers in [0, 2π] that satisfy the equation.
3
8) sin 4x = 2
A) 0, C)
π
, π
4
B)
π 5π
, 4 4
9) cos 2x = A)
8)
D) 0
2
2
9)
π 3π 5π 7π
, , , 4 4
4
4
C) 0, π π 2π 7π 7π 13π 5π 19π
, , , , , , , 12 6 3 12 6
12
3
12
B)
2π
4π
, π, 3
3
π 7π 9π 15π
, , , 8 8
8
8
D) no solution
Solve the triangle with the given parts.
10)
10)
92.4
B) β = 36.8°, b = 285, c = 355.7
D) β = 37.2°, b = 287.6, c = 355.7
A) β = 37.2°, b = 355.7, c = 287.6
C) β = 37.2°, b = 29.7, c = 24.1
Solve the triangle. If there is more than one triangle with the given parts, give both solutions.
11) β = 65.7°
b = 4.42
a = 17.5
A) α = 33.85°, γ = 81.45°, c = 25.92
B) No solution
D) α = 31.85°, γ = 81.45°, c = 23.92
C) α = 32.85°, γ = 81.45°, c = 21.92
11)
12)
12) α = 30.0°
a = 12.79
b = 25.58
A) No solution
C) β = 90.0°, γ = 60.0°, c = 22.1
B) β = 60.0°, γ = 60.0°, c = 22.1
D) β = 60.0°, γ = 90.0°, c = 22.1
Solve the triangle with the given information.
13) γ = 123.5°
a = 4.80
b = 9.41
A) c = 18.5, α = 16.4°, β = 40.1°
C) c = 15.6, α = 20.4°, β = 36.1°
13)
B) c = 12.7, α = 18.4°, β = 38.1°
D) No solution
2
14)
14) a = 8.9
b = 13.2
c = 16.1
A) α = 31.5°, β = 55.0°, γ = 93.4°
C) α = 33.5°, β = 55.0°, γ = 91.4°
B) α = 35.5°, β = 53.0°, γ = 91.4°
D) No solution
Solve the problem.
15) Find the area of the region.
A) 25.02 ft 2
15)
B) 6.26 ft 2
C) 12.51 ft 2
Find the area of the triangle using Heronʹs formula. Round to the nearest unit.
16) a = 64.6
b = 65.4
c = 67.2
A) 1869
B) 1947
C) 1961
D) 14.69 ft 2
16)
D) 1941
Find the area of the triangle. If necessary, round the answer to two decimal places.
17)
17)
105°
2
A) 2.33
9
B) 8.69
C) 101.42
D) 34.77
The vectors u, v, and w are drawn below. Sketch the specified vector.
18) u + v
A)
18)
B)
C)
3
D)
19) v + w
A)
B)
19)
C)
D)
Find the magnitudes of the horizontal and vertical components for the vector v with the given magnitude and given
direction angle. Round to an appropriate number of significant digits.
20)
20) ∣v∣ = 178.6, θ = 112°
B) vx = -66.9, vy = 165.6
A) vx = 165.6, vy = 66.9
D) vx = 66.9, vy = 165.6
C) vx = 165.6, vy = -66.9
Find the magnitude and direction angle (to the nearest tenth) of the vector. Give the measure of the direction angle as an
angle in [0°, 360°).
21)
21) 9, 9
A) 9; 225°
B) 18; 45°
C) 9 2; 45°
D) 9 2; 225°
22)
21, -1
A) 22; 347.7°
23) 0, -18
A) 324; 270°
22)
B) 22; 102.3°
C)
22; 347.7°
B) 18; 90°
C) 18; 180°
D)
22; 282.3°
23)
D) 18; 270°
Find the component form for the vector v with the given magnitude and direction angle θ.
24) v = 78.9, θ = 79.3°
B) 14.6, 77.5
C) 77.5, 14.6
D) -14.6, -77.5
A) -77.5, -14.6
25) v = 153.8, θ = 121.6°
A) 131.0, 80.6
25)
C) -80.6, 131.0
B) 80.6, 131.0
Perform the indicated operation. Use the form <a, b> for vectors.
26) u = <9, 2>, v = <-12, -3>; Find u - v.
A) <11, -15>
B) <21, 5>
C) <-3, -1>
27) v = <2, 10>; Find -1v.
A) <-2, 10>
24)
D) 131.0, -80.6
26)
D) <7, -9>
27)
B) <1, 10>
28) v = <2, 7>, u = <2, 5>; Find 8v + 9u.
A) <648, 504>
B) <32, 108>
C) <1, 9>
D) <-2, -10>
C) <72, 63>
D) <34, 101>
28)
4
Identify the complex number as real or imaginary.
29) 5i
A) Real
29)
B) Imaginary
30) 2π
A) Real
B) Imaginary
30)
31) -8 - 7i
A) Real
B) Imaginary
31)
Express in terms of i.
32) -25
A) 5i
32)
B) -5i
C) -i 5
D) ±5
Perform the indicated operation and write the answer in the form a + bi, where a and b are real numbers.
33) (4 - 7i) + (7 + 3i)
A) 11 + 4i
B) 11 - 4i
C) -11 + 4i
D) -3 + 10i
34) 5i + (-7 - i)
A) -7 + 6i
B) 7 - 4i
C) 7 - 6i
D) -7 + 4i
35) (3 + 5i) - (-5 + i)
A) -8 - 4i
B) 8 + 4i
C) -2 + 6i
D) 8 - 4i
34)
35)
36) 9i(5 - 6i)
A) 54 + 45i
B) 45i - 54
37) (9 - 4i)(2 + 6i)
A) 42 - 46i
38) (6 - 4i)2
A) 36 + 16i
36)
C) 45i + 54i2
D) 45i - 54i2
B) 42 + 46i
C) -6 - 62i
D) -24i2 + 46i + 18
B) 52 - 48i
C) 20 - 48i
D) 36 - 16i
A) -1
B) i
C) -i
D) 1
40) i42
A) -i
B) 1
C) i
D) -1
37)
38)
Evaluate the indicated power of i.
39) i8
39)
40)
Write the quotient in the form a + bi.
9 + 3i
41)
3 - 4i
A)
39 27
+ i
5
5
33)
41)
3 9
B) - + i
7 7
C)
5
3 9
+ i
5 5
D) - 39 9
+ i
7
7
42)
9
i
42)
A) -9
43)
B) -9i
C) 9
D) 9i
4
7i
43)
A) - 4
7
B)
4
7
C)
4
i
7
Write the expression in the form a + bi, where a and b are real numbers.
44) 10 + -81
A) 1
B) 10 - 9i
C) 10 + 9i
45)
4
D) - i
7
44)
D) 10 + i
-16
-4
45)
A) 2
C) -2i
B) 4i
D) 2i
Find the absolute value of the complex number. Round your answer to two decimal places, if necessary.
46) 6 + 3i
A) 6.71
B) 3.00
C) 4.18
D) 9
47) 3 - 3i
A) 9
47)
B) 4.24
C) 3.46
D) 2.45
Write the complex number in trigonometric form, using degree measure for the argument.
48) -5
A) 5(cos 270° + i sin 270°)
B) 5(cos 0° + i sin 0°)
C) 5(cos 180° + i sin 180°)
D) 5(cos 90° + i sin 90°)
49) -15 + 20i
A) 25(cos 126.9° + i sin 126.9°)
C) 25(cos 53.1° + i sin 53.1°)
48)
49)
B) 25(cos 306.9° + i sin 306.9°)
D) 25(cos 233.1° + i sin 233.1°)
Write the complex number in the form a + bi.
50) 8(cos 30° + i sin 30°)
1
3
B) + i
A) 4 + 4 3i
4
4
51)
50)
C)
3 1
+ i
4
4
D) 4 3 + 4i
5
(cos 150° + i sin 150°)
2
A) - 46)
3 1
+ i
4
4
51)
B) - 3 1
+ i
4
2
C) - 5 3 5
+ i
4
4
Perform the indicated operation. Write the answer in the form a + bi.
52) 3(cos 30° + i sin 30°) · 2(cos 90° + i sin 90°)
B) -3 + 3 3i
C) -6 - 6 3i
A) 2 6 - 2i
6
D) - 5 3 5
+ i
4
2
52)
D) 3 - 12 3i
53)
5(cos 200° + i sin 200°)
4(cos 50° + i sin 50°)
A) -2 + 2 3i
53)
1
3
B) - + i
2
2
C) -10 + 10 3i
7
D) - 5 3 5
+ i
8
8
Answer Key
Testname: FINALEXAM_REVIEW
1) B
2) D
3) D
4) B
5) D
6) D
7) C
8) B
9) B
10) D
11) B
12) C
13) B
14) C
15) C
16) A
17) B
18) C
19) C
20) B
21) C
22) C
23) D
24) B
25) C
26) B
27) D
28) D
29) B
30) A
31) B
32) A
33) B
34) D
35) B
36) A
37) B
38) C
39) D
40) D
41) C
42) B
43) D
44) C
45) A
46) A
47) B
48) C
49) A
50) D
8
Answer Key
Testname: FINALEXAM_REVIEW
51) C
52) B
53) D
9
Related documents