অন্তরকল সমীকরণ \(\dfrac {dy}{dx} = \tan \left (\dfrac {y}{x}\right ) + \dfrac {y}{x}\) এর সমাধান কোনটি?
1
\(\cos \left (\dfrac {y}{x}\right ) = cx\)
2
\(\sin \left (\dfrac {y}{x}\right ) = cx\)
3
\(\cos \left (\dfrac {y}{x}\right ) = cy\)
4
\(\sin \left (\dfrac {y}{x}\right ) = cy\)
5