for the question, siny+cosydy=0, i want to find an integrating factor.(adsbygoogle = window.adsbygoogle || []).push({});

my work:

(1/F)(dF/dx)=(1/cosy)(cosy+siny)=1+tany

=>lny=x +xtany +c`

=> y =ce^(x+xtany)

however, the question wants the integrating factor to be e^x...

why?

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# Integrating factor confusion

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