CUET · MATHS · PYQ PAPER 2023
Find the maximum value of the function sin x(1 + cos x) is:
- A \(\frac{3 \sqrt{3}}{4}\)
- B \(3 \sqrt{3}\)
- C 4
- D 3
Answer & Solution
Correct Answer
(A) \(\frac{3 \sqrt{3}}{4}\)
Step-by-step Solution
Detailed explanation
\(f(x) = \sin x (1 + \cos x)\) \(f'(x) = \cos x (1 + \cos x) + \sin x (-\sin x)\) \(f'(x) = \cos x + \cos^2 x - \sin^2 x = \cos x + \cos(2x)\) \(f'(x) = 0 \implies \cos x + 2\cos^2 x - 1 = 0\) \((2\cos x - 1)(\cos x + 1) = 0\) \(\cos x = \frac{1}{2}\) or \(\cos x = -1\) For…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from MATHS
- Slope of the tangent to the parabola \(y^2=x+2\) at a point in the 1st quadrant and lying on the line \(y=x\) is:CUET 2023 Medium
- Which of the following are normal equations to fit a straight line trend \(y=a+b x\) by the method of least squares?CUET 2025 Easy
- The general solution of the differential equation \(\frac{d y}{d x}=-4 x y^2\) is given byCUET 2025 Hard
- Match List - I with List - II.
Choose the correct answer from the options given below :List - I List - II (A) The common region determined by all the constraints of LPP is called (I) objective function (B) Minimize \(z=c_1 x_1+c_2 x_2+\cdots+c_n x_n\) is (II) convex set (C) A solution that also satisfies the non-negative restrictions of a LPP is called (III) feasible region (D) The set of all feasible solutions of a LPP is a (IV) feasible solution CUET 2023 Easy - If \(\vec{a}=2 \hat{j}-\hat{k}, \vec{b}=2 \hat{i}-3 \hat{j}+\hat{k}\) and \(\vec{c}=-\hat{i}+\hat{k}\) are three vectors, then the area (in sq, units) of the parallelogram whose diagonals are \((\vec{b}+\vec{c})\) and \((\vec{a}+\vec{c})\) isCUET 2025 Hard
- Using the concept of differentials,\(\sqrt{36.6}\) is approximately equal to:CUET 2023 Hard
More PYQs from CUET
- Which of the following is NOT a characteristic of Down's Syndrome?CUET 2023 Hard
- The area bounded by the curve \(y=x|x|, x\)-axis and the ordinates \(x=-1\) and \(x=1\) is given by:CUET 2023 Easy
- Arrange the given geological periods according to their occurrence from oldest to latest order?
(A) Devonian
(B) Cretaceous
(C) Triassic
(D) Carboniferous
Choose the correct answer from the options given below:CUET 2025 Easy - Statins are produced by:CUET 2023 Easy
- The volume of a cube is increasing at the rate of \(27 cm^3 / s\). How fast is the surface area increasing when the length of the cube is 12 cm ?CUET 2023 Medium
- Werner was the first to describe the bonding features in coordination compounds. But his theory could not answer basic questions like :
(i) Why only certain elements possess the remarkable property of forming coordination compounds ?
(ii) Why the bonds in coordination compounds have directional properties ?
(iii) Why coordination compounds have characteristics magnetic and optical properties ?
Many approaches have been put forth to explain the nature of bonding in coordination compounds viz. Valence Bond Theory (VBT), Crystal Field Theory (CFT), Ligand Field Theory (LFT) and Molecular Orbital Theory (MOT).
We shall focus our attention on elementary treatment of the application of VBT and CFT to coordination compounds.
According to this theory, the metal atom or ion under the influence of ligands can use its ( \(n -1\) )d, ns np or ns, np, nd orbitals for hybridisation to yield a set of equivalent orbitals of definite geometry such as octahedral, tetrahedral, square planar and so on.
These hybridised orbitals are allowed to overlap with ligand orbitals that can donate electron pairs for bonding.
Which of the following pair of ions is colourless according to CFT ?CUET 2023 Easy