Question: Verify the algebra leading to (1.2.5) and (1.2.6). Mathematica can be very helpful in simplifying the algebra. (K - K) 2K K - sinh(kb) sin(Ka)

Verify the algebra leading to (1.2.5) and (1.2.6). Mathematica can be very helpful in simplifying the algebra.

(K - K) 2K K - sinh(kb) sin(Ka) + cosh(kb)cos(Ka) = cos(k(a

+b)). (1.2.5)

(K - K) 2K K - sinh(kb) sin(Ka) + cosh(kb)cos(Ka) = cos(k(a +b)). (1.2.5)

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