2. Solve the following problem for wave equation using the Fourier cosine trans- form Uu - Cuzz = 0, Uz(0, t) = h(t), u(x, 0) = u(r,0) = 0. 0 < r < 0, t>0, ro0 sin(az) dr = sign (a), where sign (a) = 1 for a>0 and sign (a) = -1 %3D %3D %3D for a <0)

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