For m,n in N, let A(n) = 16(cos^n theta ...

For `m,n in N,` let `A(n) = 16(cos^n theta - sin^ntheta); and B(m) = 16(cos^m theta + sin^m theta)` If `A(6) = a cos2theta + b cos6theta,` then the value of `(a + b)` is equal to

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