o'u o'u x >0, t >0 u(0,t) = 2, t>0, u(x,0) = e, u,x,0) = 0, x> 0. Use either the Fourier-Sine or the Cosine .transform to solve the problem AO o +2 2 sin ot cos ax do of +1 .B o +2 cos at sin ox d o of +1 +2 cos at cos ax do o +1 cos at sin ox dx of +1 EO o +2 sin ot sin ax d a +1