Q. Find the value of sin(30°) + cos(60°).
Show solution
Solution
sin(30°) = 1/2 and cos(60°) = 1/2, thus the sum is 1/2 + 1/2 = 1.
Correct Answer:
B
— 1/2
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Q. Find the value of sin(cos^(-1)(1/2)).
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Solution
Let θ = cos^(-1)(1/2). Then cos(θ) = 1/2, which corresponds to θ = π/3. Therefore, sin(θ) = sin(π/3) = √3/2.
Correct Answer:
A
— √3/2
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Q. Find the value of sin(tan^(-1)(1)).
A.
1/√2
B.
1/2
C.
√2/2
D.
√3/2
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Solution
sin(tan^(-1)(1)) = 1/√2, using the triangle with opposite and adjacent sides equal.
Correct Answer:
C
— √2/2
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Q. Find the value of sin(tan^(-1)(x)).
A.
x/√(1+x^2)
B.
√(1+x^2)/x
C.
1/x
D.
x
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Solution
Using the right triangle definition, sin(tan^(-1)(x)) = opposite/hypotenuse = x/√(1+x^2).
Correct Answer:
A
— x/√(1+x^2)
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Q. Find the value of sin^(-1)(sin(π/3)).
A.
π/3
B.
2π/3
C.
π/6
D.
0
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Solution
Since π/3 is in the range of sin^(-1), sin^(-1)(sin(π/3)) = π/3.
Correct Answer:
A
— π/3
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Q. Find the value of sin^(-1)(sin(π/4)).
A.
π/4
B.
3π/4
C.
π/2
D.
0
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Solution
Since sin(π/4) = 1/√2, sin^(-1)(1/√2) = π/4.
Correct Answer:
A
— π/4
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Q. Find the value of sin^(-1)(√(1 - cos^2(θ))).
A.
θ
B.
π/2 - θ
C.
0
D.
π/4
Show solution
Solution
Since sin^2(θ) = 1 - cos^2(θ), we have sin^(-1)(√(1 - cos^2(θ))) = sin^(-1)(sin(θ)) = θ.
Correct Answer:
A
— θ
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Q. Find the value of sin^(-1)(√3/2) + cos^(-1)(1/2).
A.
π/3
B.
π/2
C.
π/4
D.
π/6
Show solution
Solution
sin^(-1)(√3/2) = π/3 and cos^(-1)(1/2) = π/3. Therefore, the sum is π/3 + π/3 = 2π/3.
Correct Answer:
A
— π/3
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Q. Find the value of sin^(-1)(√3/2) + sin^(-1)(1/2).
A.
π/2
B.
π/3
C.
π/4
D.
π/6
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Solution
sin^(-1)(√3/2) = π/3 and sin^(-1)(1/2) = π/6. Therefore, π/3 + π/6 = π/2.
Correct Answer:
A
— π/2
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Q. Find the value of sin^(-1)(√3/2).
A.
π/3
B.
π/6
C.
π/4
D.
2π/3
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Solution
sin^(-1)(√3/2) = π/3.
Correct Answer:
A
— π/3
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Q. Find the value of the coefficient of x^2 in the expansion of (3x - 4)^4.
A.
-144
B.
-216
C.
216
D.
144
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Solution
The coefficient of x^2 is C(4,2) * (3)^2 * (-4)^2 = 6 * 9 * 16 = 864.
Correct Answer:
A
— -144
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Q. Find the value of the derivative of f(x) = x^4 - 4x^3 + 6x^2 at x = 1.
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Solution
f'(x) = 4x^3 - 12x^2 + 12x. Evaluating at x = 1 gives f'(1) = 4 - 12 + 12 = 4.
Correct Answer:
A
— 0
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Q. Find the value of the determinant \( \begin{pmatrix} a & b \\ c & d \end{pmatrix} \) when \( a=1, b=2, c=3, d=4 \).
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Solution
The determinant is \( 1*4 - 2*3 = 4 - 6 = -2 \).
Correct Answer:
A
— -2
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Q. Find the value of the determinant \( |D| \) where \( D = \begin{pmatrix} 1 & 2 & 3 \\ 0 & 1 & 4 \\ 5 & 6 & 0 \end{pmatrix} \).
A.
-12
B.
-10
C.
-8
D.
-6
Show solution
Solution
The determinant is calculated as 1(1*0 - 4*6) - 2(0*0 - 4*5) + 3(0*6 - 1*5) = 1(0 - 24) - 2(0 - 20) + 3(0 - 5) = -24 + 40 - 15 = 1.
Correct Answer:
A
— -12
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Q. Find the value of the determinant: | 2 3 1 | | 1 0 4 | | 0 5 2 |
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Solution
Using the determinant formula, we calculate it to be 1.
Correct Answer:
B
— 1
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Q. Find the value of the determinant: | 2 3 1 | | 1 0 4 | | 5 6 2 |
A.
-20
B.
-10
C.
10
D.
20
Show solution
Solution
Using the determinant formula, we calculate it to be -10.
Correct Answer:
B
— -10
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Q. Find the value of the determinant: | 2 3 1 | | 1 0 4 | | 5 6 7 |
A.
-30
B.
-20
C.
20
D.
30
Show solution
Solution
Using the determinant formula, we calculate it to be -20.
Correct Answer:
B
— -20
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Q. Find the value of the determinant: | x 1 2 | | 3 x 4 | | 5 6 x | when x = 1.
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Solution
Substituting x = 1 gives the determinant | 1 1 2 | | 3 1 4 | | 5 6 1 | = 6.
Correct Answer:
C
— 6
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Q. Find the value of the integral ∫(0 to 1) (1 - x^2)dx.
A.
1/3
B.
1/2
C.
2/3
D.
1
Show solution
Solution
The integral evaluates to [x - (1/3)x^3] from 0 to 1 = 1 - 1/3 = 2/3.
Correct Answer:
C
— 2/3
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Q. Find the value of the integral ∫(0 to 1) (3x^2)dx.
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Solution
The integral ∫(3x^2)dx from 0 to 1 = [x^3] from 0 to 1 = 1.
Correct Answer:
A
— 1
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Q. Find the value of the integral ∫(0 to 1) (x^2 + 2x)dx.
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Solution
The integral evaluates to [(1/3)x^3 + x^2] from 0 to 1 = (1/3 + 1) - 0 = 4/3.
Correct Answer:
B
— 2
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Q. Find the value of x if 3x + 5 = 20.
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Solution
Subtracting 5 from both sides gives 3x = 15, thus x = 15/3 = 5.
Correct Answer:
A
— 5
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Q. Find the value of z if z^2 + 4z + 8 = 0.
A.
-2 + 2i
B.
-2 - 2i
C.
-4 + 0i
D.
-4 - 0i
Show solution
Solution
Using the quadratic formula, z = [-4 ± √(16 - 32)]/2 = -2 ± 2i.
Correct Answer:
A
— -2 + 2i
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Q. Find the value of z if z^2 = -16.
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Solution
Taking square root, z = ±√(-16) = ±4i.
Correct Answer:
A
— 4i
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Q. Find the value of z^2 if z = 1 + i.
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Solution
z^2 = (1 + i)^2 = 1 + 2i + i^2 = 1 + 2i - 1 = 2i.
Correct Answer:
B
— 2
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Q. Find the value of \( k \) for which the determinant \( \begin{vmatrix} 1 & 2 & 3 \\ 4 & k & 6 \\ 7 & 8 & 9 \end{vmatrix} = 0 \)
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Solution
Setting the determinant to zero gives \( k = 6 \).
Correct Answer:
B
— 6
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Q. Find the value of \( \det \begin{pmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{pmatrix} \).
Show solution
Solution
The determinant of the identity matrix is always 1.
Correct Answer:
B
— 1
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Q. Find the value of \( \sin(\sin^{-1}(\frac{1}{2})) \).
A.
0
B.
\( \frac{1}{2} \)
C.
1
D.
undefined
Show solution
Solution
By definition, \( \sin(\sin^{-1}(x)) = x \). Therefore, \( \sin(\sin^{-1}(\frac{1}{2})) = \frac{1}{2} \).
Correct Answer:
B
— \( \frac{1}{2} \)
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Q. Find the value of ∫ from 0 to 1 of (1 - x^2) dx.
A.
1/3
B.
1/2
C.
2/3
D.
1
Show solution
Solution
The integral evaluates to [x - x^3/3] from 0 to 1 = (1 - 1/3) = 2/3.
Correct Answer:
C
— 2/3
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Q. Find the value of ∫ from 0 to 1 of (e^x) dx.
Show solution
Solution
The integral evaluates to [e^x] from 0 to 1 = e - 1.
Correct Answer:
A
— e - 1
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Showing 751 to 780 of 2847 (95 Pages)
Mathematics Syllabus (JEE Main) MCQ & Objective Questions
The Mathematics Syllabus for JEE Main is crucial for students aiming to excel in competitive exams. Understanding this syllabus not only helps in grasping key concepts but also enhances your ability to tackle objective questions effectively. Practicing MCQs and important questions from this syllabus is essential for solid exam preparation, ensuring you are well-equipped to score better in your exams.
What You Will Practise Here
Sets, Relations, and Functions
Complex Numbers and Quadratic Equations
Permutations and Combinations
Binomial Theorem
Sequences and Series
Limits and Derivatives
Statistics and Probability
Exam Relevance
The Mathematics Syllabus (JEE Main) is not only relevant for JEE but also appears in CBSE and State Board examinations. Students can expect a variety of question patterns, including direct MCQs, numerical problems, and conceptual questions. Mastery of this syllabus will prepare you for similar topics in NEET and other competitive exams, making it vital for your overall academic success.
Common Mistakes Students Make
Misinterpreting the questions, especially in word problems.
Overlooking the importance of units and dimensions in problems.
Confusing formulas related to sequences and series.
Neglecting to practice derivations, leading to errors in calculus.
Failing to apply the correct methods for solving probability questions.
FAQs
Question: What are the key topics in the Mathematics Syllabus for JEE Main? Answer: Key topics include Sets, Complex Numbers, Permutations, Binomial Theorem, and Calculus.
Question: How can I improve my performance in Mathematics MCQs? Answer: Regular practice of MCQs and understanding the underlying concepts are essential for improvement.
Now is the time to take charge of your exam preparation! Dive into solving practice MCQs and test your understanding of the Mathematics Syllabus (JEE Main). Your success is just a question away!