dy/dx=sin(x+y)+cos(x+y) I’v tried substituting (x+y)=z, but I don’t think its gonna work. Can anyone help? Also, tan^-1(dy/dx)=x+y I'v tried dy/dx=tan(x+y), substituting x+y=z.
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Originally Posted by sverbinayak dy/dx=sin(x+y)+cos(x+y) I’v tried substituting (x+y)=z, but I don’t think its gonna work. Can anyone help? Also, tan^-1(dy/dx)=x+y I'v tried dy/dx=tan(x+y), substituting x+y=z. Why do you think substituting $\displaystyle z = x + y$ won't work? Did you actually try doing it? Please show what you get and where you're stuck.
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