Which of these best describes the Iroquois?
O
A. An ancient empire that was destroyed by t...
Mathematics, 19.03.2020 10:39 esanchez2002fcb
Which of these best describes the Iroquois?
O
A. An ancient empire that was destroyed by the Spaniards
O
B. A group of tribes that formed a confederacy
O
C. A group of fierce fighters that conquered most of Mexico
D. An advanced civilization that studied astronomy
Answers: 3
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Prove (a) cosh2(x) β sinh2(x) = 1 and (b) 1 β tanh 2(x) = sech 2(x). solution (a) cosh2(x) β sinh2(x) = ex + eβx 2 2 β 2 = e2x + 2 + eβ2x 4 β = 4 = . (b) we start with the identity proved in part (a): cosh2(x) β sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 β sinh2(x) cosh2(x) = 1 or 1 β tanh 2(x) = .
Answers: 3
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