how to send the question to a specialist Consider a hollow sphere with an inner radius A and an outer radius B. Find the steady-state temperature distribution inside the sphere, assuming that the sphere is thermally insulated at r = A (i.e., du/dr at r = A equals 0), and the temperature at r = B is given by:
u(B, theta, phi) = T(cos^4(theta) cos(4phi) + cos^2(theta) - 1),
where T is a positive constant.