Mathematics, 30.08.2019 23:40 sukhmanksidhu
Obtain an equation for cosh(3x) in terms of cosh(x) and sinh(x).
Answers: 1
![\cos3ix=\mathrm{Re}\left[(\cos ix-i\sin ix)^3\right]](/tpl/images/0213/3853/ebe9c.png)
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Obtain an equation for cosh(3x) in terms of cosh(x) and sinh(x)....
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