Solve (a) $\frac{dx}{x^2+y^2} = \frac{dy}{2x} = \frac{dz}{(x+y)z}$. (b) $z^2(p^2 + q^2 + 1) = c^2$

Solve (a) $\frac{dx}{x^2+y^2} = \frac{dy}{2x} = \frac{dz}{(x+y)z}$. (…

Previous year question with solution for Engineering Mathematics-II.