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Mathematics, 25.02.2021 01:00 zchwilke2981
(I typed it wrong the 1st time)
In a theater there are 15 chairs in the first row, each row has 3 more chairs than the previous
row, and there are 15 rows. How many chairs are in the theater?
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Answers: 3
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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) = .
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Plzzz answer both questions and i will give you 100 points
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(I typed it wrong the 1st time)
In a theater there are 15 chairs in the first row, each row has 3 m...
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