I WILL GIVE YOU BRAINERLEST AND A LIKE Olivia's father is going to build a new
deck in the backyard. He draws this
design for the deck.
What is the area of the deck

∆red ≅ ∆ by rule will give brainiest if possible

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) = .

3.4a=57.8 what is the the value of a