1.

The solution of the DE `x (dy)/(dx) = cot y ` isA. ` x cos y = C `B. `x tan y = C `C. `x sec y = C `D. none of these

Answer» Correct Answer - A
`int tan y dy = int (1)/(x) dx rArr log x = log sec y +log C.`
` rArr x = C sec y rArr x cos y =C`.


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