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Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) โ sinh2(x) = 1 and (b) 1 โ tanh 2(x) = sech 2(x). solution (a) cosh2(x) โ sinh2(x) = ex + eโx 2 2 โ 2 = e2x + 2 + eโ2x 4 โ = 4 = . (b) we start with the identity proved in part (a): cosh2(x) โ sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 โ sinh2(x) cosh2(x) = 1 or 1 โ tanh 2(x) = .
Answers: 3
Mathematics, 21.06.2019 23:20
6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?
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Mathematics, 22.06.2019 03:00
Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?
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Mathematics, 22.06.2019 03:30
Jack brought 12 pet monkeys. if each monkey cost $45.99, how much money did he spend in all?
Answers: 2
What is 2.828427125 to the nearest thousandth?...
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