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The differential equation for which `y=a cos x+b sin x ` is a solution, isA. `(d^(2)y)/(dx^(2))+y=0`B. `(d^(2)y)/(dx^(2))-y=0`C. `(d^(2)y)/(dx^(2))+(a+b)y=0`D. `(d^(2)y)/(dx^(2))+(a-b)y=0` |
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Answer» Correct Answer - A We have, `y=a cos x+b sin x` `rArr" "(dy)/(dx)=-a sin x+b cosx` `rArr" "(d^(2)y)/(dx^(2))=-a cos x-b sin xrArr (d^(2)y)/(dx^(2))=-y` |
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