plzzzz need help ODEs \((\cos x) (e^y -y) \frac{dy}{dx}=e^y\sin 2x \) i did these steps but i couldnt continue separate variables \(\Large (1 - ye^{-y})dy = \frac{2\sin(x)\cos(x)}{\cos(x)}dx\) @ganeshie8 @terenzreignz
errr you could just cancel out the cosx and then take the antiderivative on both sides to see what you have
Why not just integrate?
\[ \int 2\sin(x)\;dx = -2\cos(x)+C \]
oh sorry yeah .. integrate... XD
yeah that's right integrate both sides... integration by parts for y?!
@BSwan check it out !
by exact ??
exact? for real? that has to be in the form of M (x,y) dy + N (x,y) dx = 0
then you have to take My and Nx and if they are not the same, you need to find the integrating factor... still won't work? then exact isn't a good choice
sin2x=2sinxcosx, so \((e^y-y)dy/dx=2\sin x e^y\) separating variables: \(1-ye^{-y}dy=2sinxdx\)
\[(1-y/e^y)dy = 2sinxdx \] now u can use substitution method in LHS to solve it.. |dw:1397292992744:dw|
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