Suppose $u(t,x)$ and $v(t,x)$ are $C^2$ functions defined on $\Bbb R^2$ that satisfy the first-order system of partial differential equations $u_t$ = $v_x$, $v_t$ = $u_x$.
Now I have to answer the following questions, but I have no clue how to start.
1: Show that both $u$ and $v$ are classical solutions to the wave equation $u_{tt}$ = $u_{xx}$.
2: Which result from multivariable calculus do you need to justify the conclusion?
Best Answer