The solution of difference equation un+1 - 2uncos θ + un-1= 0 will – McqOptions

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1.	The solution of difference equation un+1 - 2uncos θ + un-1= 0 will be __________, where c1 and c2 are constants.
A.	un = (c1 + c2n) sin n θ cos n θ
B.	un = (cq + c2n) cos n θ + sin n θ
C.	un = (-1)n [c1 cos(n - 1)θ + c2(n - 1)θ]
D.	un = c1 cos n θ + c2 sin n θ
Answer» E.

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