Answers: 2
Mathematics, 21.06.2019 19:50
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
Mathematics, 21.06.2019 22:30
60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums. what is the probability that the applicant who gets the job plays drums or guitar?
Answers: 1
Can you factorise 3x²+5x+2...
History, 25.05.2021 04:10
Mathematics, 25.05.2021 04:10
Physics, 25.05.2021 04:10
Biology, 25.05.2021 04:10
Mathematics, 25.05.2021 04:10
Mathematics, 25.05.2021 04:10
Mathematics, 25.05.2021 04:10
Mathematics, 25.05.2021 04:10
Mathematics, 25.05.2021 04:20
Mathematics, 25.05.2021 04:20