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If sinx is the integrating facor (IF) of the linear differetnial equation ` (dy)/(dx)+Py =Q` , then P isA. log sin xB. cos xC. tan xD. cot x

Answer» Correct Answer - d
We know that , IF of `(dy)/(dx) + Py = Q` is
` IF = e^(int Pdx)`
` sin x = e^(int p dx)`
On differentiating both sides , we get
` cos x = e^(int pdx) P`
` cos x = sin P rArr P = cot x`


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