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CUET · MATHS · PYQ PAPER 2025

Consider the differential equation \(\frac{d y}{d x}+y \tan x=\sec x\), then which of the following statements are correct?
(A) It is homogeneous
(B) It has \(\sec x\) as its integrating factor
(C) Its general solution is \(y \sec x=\tan x+c\), where \(c\) is an arbitrary constant.
(D) Its degree is not defined
Choose the correct answer from the options given below :

  1. A (A) and (D) only
  2. B (B) and (C) only
  3. C (C) and (D) only
  4. D (B), (C) and (D) only
Verified Solution

Answer & Solution

Correct Answer

(B) (B) and (C) only

Step-by-step Solution

Detailed explanation

\( P(x) = \tan x \) \( \text{IF} = e^{\int \tan x dx} \) \( \text{IF} = e^{\ln|\sec x|} = \sec x \) \( y \cdot \text{IF} = \int Q(x) \cdot \text{IF} dx + c \) \( y \sec x = \int \sec x \cdot \sec x dx + c \) \( y \sec x = \int \sec^2 x dx + c \) \( y \sec x = \tan x + c \) (B)…
From CUET
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