Question

1) Verify the following identities a) cosh2(x) - sin2h(x) = 1 b) cosh(x+y) = cosh(x) cosh(y)...

1) Verify the following identities

a) cosh2(x) - sin2h(x) = 1

b) cosh(x+y) = cosh(x) cosh(y) + sinh(x) sinh(y)

2) Show that

d/dx (csch(x)) = -csch(x) coth(x)

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