If y = A cos nx + B sin nx, then d ^ 2 y dx ^ 2 =
Mathematics · JEE Main · NTA Exams — Limit, Continuity and Differentiability
If y = A cos nx + B sin nx, then \(\frac{\mathrm{d}^{2} \mathrm{y}}{\mathrm{dx}^{2}}=\)
- –n2y
- –y
- n2y
- none of these
Answer
(A) –n 2 y
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