Asum of money doubles in 20 years on simple interest. it will
get triple at the same
rate in

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) = .

1/4x+5=3/4. i can't get access to the answer to this question! and, my request on "contact us" will not go

Which additional information, if true, would to prove that δlmp ≅ δnmp by hl? check all that apply.