Olym DOY! 3. Jordon earns $17.65 per hour for 35 hours and time and a half for overtime for hours worked over 35. If Jordan worked 42 hours last week... a. How many hours of overtime did he work? b. What is his overtime rate? (hourly dollar amount) c. How much was his pay for the week?​

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) = .