CUET · MATHS · PYQ PAPER 2025
The function \(f: R \rightarrow[-1,1]\) defined by f(x) = cos x is:
- A one-one but not onto
- B onto but not one-one
- C Both one-one and onto
- D Neither one-one nor onto
Answer & Solution
Correct Answer
(B) onto but not one-one
Step-by-step Solution
Detailed explanation
\(f(x_1) = f(x_2) \Rightarrow \cos x_1 = \cos x_2\). E.g., \(\cos 0 = 1, \cos 2\pi = 1\), but \(0 \neq 2\pi\). Not one-one. Range of \(\cos x\) for \(x \in R\) is \([-1,1]\). Codomain is \([-1,1]\). Range = Codomain. Onto. Onto but not one-one.
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
- Area of the region bounded by the curve \(y^2=4 x, y\)-axis and the line \(y=3\) is equal to:CUET 2025 Medium
- If the lines \(\frac{x-1}{-3} = \frac{y-2}{2\lambda} = \frac{z-3}{2}\) and \(\frac{x-1}{3\lambda} = \frac{y-1}{2} = \frac{z-6}{-5}\) are perpendicular. Then the value of \(\lambda\) is:CUET 2023 Easy
- The value of \(\int_{-\frac{\pi}{2}}^{\frac{\pi}{2}}(\sin |x|-\cos |x|) d x\) is :CUET 2023 Hard
- It water is mixed with milk to gain \(20\%\) by selling the mixture at cost price. Then ratio of water to milk in mixture, is :CUET 2025 Hard
- Let \(A=\left[a_{i j}\right]_{n \times n}\) be a matrix, then match List-I with List-
Choose the correct answer from the options given below:List-I List-II (A) \(|A|=0\) (I) A is a symmetric matrix (B) \(|A| \neq 0\) (II) A is a skew-symmetric matrix (C) \(A^T=A\) (III) A is a singular matrix (D) \(A^T=-A\) (IV) A is a non-singular matrix CUET 2025 Easy - If \(A=\left[\begin{array}{lll}2 & 0 & 0 \\ 0 & 2 & 0 \\ 0 & 0 & 2\end{array}\right]\) then \(A^5\) is :CUET 2023 Easy
More PYQs from CUET
- Arrange the following in order of their appearance, if a sperm starts travelling from testicular lobules?
(A) Urethra
(B) Vas deferens
(C) Urethral meatus
(D) Vasa efferentia
Choose the correct answer from the options given below:CUET 2025 Easy - The area bounded by the curve \(y=\log x, y=0\) and \(x=e\), isCUET 2025 Hard
- For which value of \(k\), inverse does not exist for the matrix\(
\left[\begin{array}{ll}
1 & 2 \\
k & 6
\end{array}\right]
\)CUET 2023 Medium - The corner points of the feasible region of the LPP: Minimize \(Z=-50 x+20 y\) subject to
\(2 x-y \geq-5,3 x+y \geq 3,2 x-3 y \leq 12\) and \(x, y \geq 0\) are:CUET 2025 Easy - Match List I with List II
Choose the correct answer from the options given below:LIST I LIST II A. Pain killers I. Antipyretics B. Treatment of infections II. Analgesics C. Reducing fever III. Antibiotics D. Treatment of depression IV. Tranquilizers CUET 2023 Hard - Alcohol is a depressant, which means that even small amounts of alcohol slow down the actions of parts of the brain, so alcohol lengthens the time you take to respond to a stimulus.
Different people react differently to alcohol. In some people, it increase their feelings of aggression, and releases their inhibitions so that they are more likely to be violent or commit other crimes.
An alcoholic needs to drink quite large quantities of alcohol regularly. This causes many parts of the body to be damaged, because alcohol is poisonous to cells. Probably, there are many factors which decide whether or not a person becomes alcoholic. Over a long period of time, it can cause loss of memory and confusion. One way in which the damage is done is that alcohol in the body fluids draws water out of cells by osmosis.
Continuous intake of alcohol causes _________CUET 2023 Easy