Cary is 4 4 years older than dan. in 10 10 years the sum of their ages will be 66 66. find the age of each man now

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Which graph represents the equation y =4x

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) = .