If y=Ccos x, the corresponding differential equation is:
If y=Ccos x, the corresponding differential equation is:
- A. d²y/dx²+y=0
- B. d²y/dx²−y=0
- C. dy/dx=y
- D. dy/dx=−y
Answer: A) d²y/dx²+y=0
Explanation: Differentiating twice gives d²y/dx²=−y.
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