Am I the only one that feels like I’m in someone else’s body walking around ?

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) = .

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?