Pregunta: Solve (sin x cos y)dx + (cos x sin y)dy = 0.

A differential equation is of the form Mdx+Ndy=0 is said to be exact if $\frac{\partial \mathrm{M}}{\partial \mathrm{y}}=\frac{\partial \mathrm{N}}{\partial \mathrm{x}}$ and its solution is ${\int }_{\mathrm{y}\mathrm{c}\mathrm{o}\mathrm{n}\mathrm{s}\tan \mathrm{t}}\mathrm{M}\mathrm{d}\mathrm{x}+\int {\mathrm{N}}_1\mathrm{d}\mathrm{y}=\mathrm{c}$ where ${\mathrm{N}}_1=$...