(01.05 MC)Which fraction is equivalent to 4/-9?
A- -4/9
B- 4/9
C- -4/-9
D- 9-4...
Mathematics, 21.12.2020 03:50 Hali07
(01.05 MC)Which fraction is equivalent to 4/-9?
A- -4/9
B- 4/9
C- -4/-9
D- 9-4
Answers: 2
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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) = .
Answers: 3
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Answers: 1
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