Mathematics, 18.05.2021 14:00 sarahelisabeth444

PLEASE PLEASE HELP! Ill give brainliest!! will report useless answers (eg links)

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Mathematics, 21.06.2019 18:00, YoungLarQ

What is the missing step in this proof ?

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Mathematics, 21.06.2019 18:40, helpme6191

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Mathematics, 21.06.2019 19:00, rodriguezzamyy

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Mathematics, 21.06.2019 19:50, Roshaan8039

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .

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