Are the boundary values supposed to be u_x(0,t) = u_x(\pi,t) = 0 (as it says in the problem) rather than u(0,t) = u(\pi,t) = 0?

Are the boundary values supposed to be u_x(0,t) = u_x(\pi,t) = 0 (as it says in the problem) rather than u(0,t) = u(\pi,t) = 0?