Problem #7:
Consider the below wave equation with the given conditions.
0 <1 6 > x > 0
u(O,t) = u(9,t) = 0, t > 0
8 648 2 3. n=1
Ou u(x,0) = 0,
2x(
{1-(-1)} sin(ntx/9), 0< x < 9.
The solution to the above boundary-value problem is of the form
8 u(x,t) = : 28 g(n, t) sin ? ni n=1
Find the function g(n, t)