It is not possible to determine what must be true about h and h' at x = π based on the information given. The equation of the tangent line at x = n tells us about the slope and y-intercept of the tangent line at that point, but it does not give us any information about the value of h or h' at x = π.
To determine what must be true about h and h' at x = π, we would need additional information about h, such as an equation for h or information about h at other points.