Which best describes the function on the graph?
direct variation; k = -2
direct variation; k=-1/2
inverse variation; k= -2
inverse variation; k=-1/2

Find the slope of a line given the following two points

Divide. write in the simplest form. 4 1/6 divided by 10

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) = .