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If y=(sinx)/(1+(cosx)/(1+(sinx)/(1+(cosx...

If `y=(sinx)/(1+(cosx)/(1+(sinx)/(1+(cosx)/(1+ tooo)))),p rov et h a t(dy)/(dx)=((1+y)cosx+ysinx)/(1+2y+cosx-sinx)`

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`y=(sinx)/(1+(cosx)/(1+(sinx)/(1+(cosx)/(1+ tooo))))`
`y=frac{sinx}{1+frac{cos x}{1+y]}`
`=frac{sinx}{frac{1+y+cos x}{1+y}}`
`=frac{(1+y)sinx}{1+y+cos x}`
`=y+y^2+ycosx=sinx+ysinx`
`frac{dy}{dx}+2frac{dy}{dx}+cosx frac{dy}{dx}-ysinx=cosx+sinx frac{dy}{dx}+ycosx`
`frac{dy}{dx}+2yfrac{dy}{dx}+cosx frac{dy}{dx}-sinxfrac{dy}{dx}=cosx+ycosx+ysinx`
`frac{dy}{dx}=frac{(1+y)cosx+ysinx}{1+2y+cosx-sinx}`
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