Which expression is equivalent to the given expression? 10q + 5

a5q + 5q + 5
b10q + 5 + 5
c5q + 10
d5q + 5

Question 5 spring semester final exam math evaluate

Solve -2(4y + 6) = 52. 5 -5 8 -8 and !

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) = .