JEE Main · 2025 · 04 Apr 2025 · Shift 2 · Differential Equations

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If a curve passes through the point and satisfies the differential equation , then at , the value of cosy is:
  1. (A)
  2. (B)
  3. (C)✓ Correct
  4. (D)

Answer: (C)

Solution

Rearranged, the equation reads . With this becomes the linear equation , whose integrating factor is . Then , and integrating by parts twice gives . The point fixes . At , , so .

JEE Main · 2025 · 04 Apr 2025 · Shift 2 · Single correct option

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