Class 12 Continuity And Differentiability · Mcq Single Correct1 Markssecond_derivatives
Class 12 Maths · Continuity And Differentiability · Mcq Single Correct #18
If x(t)=A cos4t+B sin4t, find d²x/dt².
✅ Step-by-Step Solution
Final Answer: Option (D): −16x
- Differentiate twice: x″=−16A cos4t−16B sin4t=−16x.
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