Q. If sin(x) = 3/5, what is the value of cos(x)?
A.
4/5
B.
3/5
C.
5/4
D.
1/5
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Solution
Using the identity sin^2(x) + cos^2(x) = 1, we have cos^2(x) = 1 - (3/5)^2 = 1 - 9/25 = 16/25. Therefore, cos(x) = ±4/5.
Correct Answer: A — 4/5
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Q. If sin(α) = 0.6, what is the value of cos(α) using the identity?
A.
0.8
B.
0.6
C.
0.4
D.
0.2
Show solution
Solution
Using sin^2(α) + cos^2(α) = 1, we find cos(α) = √(1 - 0.6^2) = √(1 - 0.36) = √0.64 = 0.8.
Correct Answer: A — 0.8
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Q. If sin(θ) = 0, what are the possible values of θ in the interval [0, 2π]?
A.
0, π
B.
0, 2π
C.
π/2, 3π/2
D.
π/4, 3π/4
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Solution
The angles where sin(θ) = 0 in the interval [0, 2π] are θ = 0 and θ = π.
Correct Answer: A — 0, π
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Q. If sin(θ) = 0, what are the possible values of θ?
A.
0°, 180°
B.
90°, 270°
C.
45°, 135°
D.
30°, 150°
Show solution
Solution
sin(θ) = 0 at θ = 0° and 180°.
Correct Answer: A — 0°, 180°
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Q. If sin(θ) = 0.5, what is θ in degrees? (2014)
A.
30°
B.
45°
C.
60°
D.
90°
Show solution
Solution
sin(30°) = 0.5, so θ = 30°.
Correct Answer: A — 30°
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Q. If sin(θ) = 0.6, what is the approximate value of θ in degrees? (2019)
A.
36.87°
B.
45°
C.
53.13°
D.
60°
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Solution
Using inverse sine, θ ≈ 36.87°
Correct Answer: C — 53.13°
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Q. If sin(θ) = 0.8, what is cos(θ) using Pythagorean identity? (2020)
A.
0.6
B.
0.8
C.
0.4
D.
0.2
Show solution
Solution
Using sin²(θ) + cos²(θ) = 1, cos²(θ) = 1 - 0.64 = 0.36, cos(θ) = 0.6
Correct Answer: A — 0.6
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Q. If sin(θ) = 0.8, what is cos(θ)? (2022)
A.
0.6
B.
0.8
C.
0.4
D.
0.2
Show solution
Solution
Using sin²(θ) + cos²(θ) = 1, cos(θ) = √(1 - 0.8²) = √(0.36) = 0.6.
Correct Answer: A — 0.6
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Q. If sin(θ) = 0.866, what is θ in degrees? (2020)
A.
30°
B.
45°
C.
60°
D.
90°
Show solution
Solution
sin(60°) = √3/2 ≈ 0.866, so θ = 60°.
Correct Answer: C — 60°
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Q. If sin(θ) = 0.866, what is θ? (2022)
A.
30°
B.
45°
C.
60°
D.
90°
Show solution
Solution
sin(60°) = √3/2 ≈ 0.866, so θ = 60°.
Correct Answer: C — 60°
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Q. If sin(θ) = 1, what is the value of θ? (2023)
A.
0°
B.
90°
C.
180°
D.
270°
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Solution
sin(90°) = 1, so θ = 90°.
Correct Answer: B — 90°
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Q. If sin(θ) = 1, what is θ? (2023)
A.
0°
B.
30°
C.
90°
D.
180°
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Solution
sin(90°) = 1, so θ = 90°.
Correct Answer: C — 90°
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Q. If sin(θ) = 1/2, what is the possible value of θ? (2022)
A.
30°
B.
60°
C.
90°
D.
45°
Show solution
Solution
sin(30°) = 1/2, so θ = 30°.
Correct Answer: A — 30°
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Q. If sin(θ) = 1/√2, what is cos(θ)? (2022)
A.
1/√2
B.
0
C.
√2/2
D.
1
Show solution
Solution
Using sin²(θ) + cos²(θ) = 1, cos(θ) = √(1 - (1/√2)²) = √(1/2) = √2/2
Correct Answer: C — √2/2
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Q. If sin(θ) = 1/√2, what is the value of cos(θ)?
A.
1/√2
B.
0
C.
√2/2
D.
1
Show solution
Solution
Using the identity sin^2(θ) + cos^2(θ) = 1, we have cos^2(θ) = 1 - (1/√2)^2 = 1 - 1/2 = 1/2. Thus, cos(θ) = ±1/√2.
Correct Answer: A — 1/√2
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Q. If sin(θ) = 1/√2, what is the value of θ in degrees?
A.
45°
B.
30°
C.
60°
D.
90°
Show solution
Solution
sin(θ) = 1/√2 at θ = 45°.
Correct Answer: A — 45°
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Q. If sin(θ) = 1/√2, what is the value of θ in the range [0°, 360°]?
A.
45°, 225°
B.
30°, 150°
C.
60°, 300°
D.
90°, 270°
Show solution
Solution
sin(θ) = 1/√2 at θ = 45° and θ = 225°.
Correct Answer: A — 45°, 225°
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Q. If sin(θ) = 1/√2, what is the value of θ?
A.
30°
B.
45°
C.
60°
D.
90°
Show solution
Solution
sin(θ) = 1/√2 at θ = 45°.
Correct Answer: B — 45°
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Q. If sin(θ) = 1/√2, what is θ in degrees?
A.
30°
B.
45°
C.
60°
D.
90°
Show solution
Solution
sin(45°) = 1/√2, so θ = 45°
Correct Answer: B — 45°
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Q. If sin(θ) = 3/5, what is cos(θ)?
A.
4/5
B.
3/5
C.
5/4
D.
1/5
Show solution
Solution
Using the Pythagorean identity, cos(θ) = √(1 - sin²(θ)) = √(1 - (3/5)²) = 4/5.
Correct Answer: A — 4/5
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Q. If sin(θ) = 4/5, what is the value of tan(θ)?
A.
3/4
B.
4/3
C.
5/4
D.
5/3
Show solution
Solution
Using the identity tan(θ) = sin(θ)/cos(θ) and cos(θ) = √(1 - sin^2(θ)), we find cos(θ) = 3/5. Thus, tan(θ) = (4/5)/(3/5) = 4/3.
Correct Answer: A — 3/4
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Q. If sin^(-1)(x) + cos^(-1)(x) = π/2, then the value of x is:
Show solution
Solution
The equation sin^(-1)(x) + cos^(-1)(x) = π/2 holds for all x in the domain of the functions, which is [-1, 1]. Therefore, x can be any value in this range.
Correct Answer: A — 0
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Q. If sin^(-1)(x) + cos^(-1)(x) = π/2, then what is the value of x?
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Solution
Using the identity sin^(-1)(x) + cos^(-1)(x) = π/2, we can conclude that x can take any value in the range [-1, 1].
Correct Answer: A — 0
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Q. If sin^(-1)(x) = π/4, what is the value of x?
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Solution
If sin^(-1)(x) = π/4, then x = sin(π/4) = √2/2.
Correct Answer: B — √2/2
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Q. If some fruits are apples and all apples are sweet, which of the following is true?
A.
All fruits are sweet
B.
Some fruits are sweet
C.
No fruits are sweet
D.
All sweet things are fruits
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Solution
Since some fruits are apples and all apples are sweet, it follows that some fruits are sweet.
Correct Answer: B — Some fruits are sweet
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Q. If T is the daughter of U and V is the son of U, how is V related to T?
A.
Brother
B.
Cousin
C.
Father
D.
Uncle
Show solution
Solution
V is the brother of T as both are children of U.
Correct Answer: A — Brother
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Q. If T is to the right of U and S is to the left of U, where is S in relation to T?
A.
Left
B.
Right
C.
Same
D.
None
Show solution
Solution
S is to the left of T.
Correct Answer: A — Left
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Q. If tan A = 3/4, what is the value of sin A?
A.
3/5
B.
4/5
C.
5/3
D.
5/4
Show solution
Solution
Using the identity tan A = sin A / cos A, we can find sin A = tan A * cos A. Using the Pythagorean identity, we find sin A = 3/5.
Correct Answer: A — 3/5
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Q. If tan θ = 1, what is the value of sin θ?
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Solution
Since tan θ = sin θ / cos θ and tan θ = 1, we have sin θ = cos θ. For θ = 45°, sin θ = 1/√2.
Correct Answer: A — 1/√2
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Q. If tan(x) = 1, what is the value of sin(x) + cos(x)?
Show solution
Solution
If tan(x) = 1, then sin(x) = cos(x). Therefore, sin(x) + cos(x) = 2sin(x) = 2(1/√2) = √2.
Correct Answer: A — √2
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