Question: Prove that (i) (cosh x + sinh x) = cosh nx + sinh nx, n being a positive integer. (ii) (1+tanh x 1 -

Prove that (i) (cosh x + sinh x)" = cosh nx +

Prove that (i) (cosh x + sinh x)" = cosh nx + sinh nx, n being a positive integer. (ii) (1+tanh x 1 - tanh x = cosh 6x + sinh 6x.

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