Question: In problems, verify that given equations are identities. (a) ex = cosh x + sinh x (b) e2x = cosh 2x + sinh 2x (c)

In problems, verify that given equations are identities.
(a) ex = cosh x + sinh x
(b) e2x = cosh 2x + sinh 2x
(c) e-x = cosh x - sinh x
(d) e-2x = cosh 2x - sinh 2x

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