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निम्नलिखित अवकल समीकरण को हल करें|
`cosx(1+cos y)dx - siny (1+sinx) dy=0`

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दिया गया अवकल समीकरण हैं:
`cosx (1+ cosy)dx - siny(1+sinx) dy=0` ..............(1)
या, `(cos x)/(1+ sinx) dx -(sin y)/(1+ cos y) dy =0`
या, `int ( cosx)/(1+sin x)dx -int (siny)/(1+ cosy) dy = log C`, जहाँ C एक स्वैच अचर हैं|
या, `log |1 + sinx| + log|1 + cos y|=log C`
या, `log|(1+sinx)(1+cos y)|=log C`
या, `(1+ sinx) (1+cosx) =C [therefore (1+sinx) gt 0, 1+ cos y gt 0]`
यदि दिए गए अवकल समीकरण का अभीष्ट हल हैं|

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