(a) Find the particular solution of the differential equation $\frac{dy}{dx} = \frac{x + y}{x}$, $y(1) = 0$. OR (b) Find the general solution of the differential equation $e^x \tan y \, dx + (1 - e^x) \sec^2 y \, dy = 0$.

Year	Paper Code	Set	Position
CBSE 2023	Series 65-4	Set 1	Question 29
CBSE 2023	Series 65-4	Set 2	Question 28
CBSE 2023	Series 65-4	Set 3	Question 30

• Step 1: Stating the fundamental formula / law statement (+1 Mark)
• Step 2: Intermediate mathematical substitution or proof steps (+1 Mark)
• Step 3: Correct final value or conclusion with mandatory SI units (+1 Mark)