Which expression is equivalent to 27 + 45? (1 point)
A. 8(3 + 6)
B. 8(19 + 37)
C. 9(3 +...
Mathematics, 05.11.2020 23:40, tohanab
Which expression is equivalent to 27 + 45? (1 point)
A. 8(3 + 6)
B. 8(19 + 37)
C. 9(3 + 5)
D. 9(18 + 36)
Answers: 3
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Prove (a) cosh2(x) ā sinh2(x) = 1 and (b) 1 ā tanh 2(x) = sech 2(x). solution (a) cosh2(x) ā sinh2(x) = ex + eāx 2 2 ā 2 = e2x + 2 + eā2x 4 ā = 4 = . (b) we start with the identity proved in part (a): cosh2(x) ā sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 ā sinh2(x) cosh2(x) = 1 or 1 ā tanh 2(x) = .
Answers: 3
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Answers: 1
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Answers: 1
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