If y = (cosx - sinx)/(cosx + sinx) , Prove that dy/dx + y² + 1 = 0

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If y = (cosx - sinx)/(cosx + sinx) , Prove that dy/dx + y² + 1 = 0
if y=cosx-sinx/cosx+sinx prove that dy/dx+y^2+1=0
If y = (cosx - sinx)(cosx + sinx) , prove that dydx + y^2 + 1 = 0.
If `y=(cosx-sinx),(cosx+sinx)`, prove that `(dy),(dx)=y^2+1=0`
If y = (cosx - sinx)/(cosx + sinx) ,prove that dy/dx +y²+1 = 0
#math #calculus
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Thanku so much sir such a nice explanation 🙏👌👍

swatisingh