Find the area of the composite figure. First, find the area of the parallelogram.

I NEED HELP ASAP
7 cm
Parallelogram
Area = [?] cm2
14 cm
Rectangle
Area = [ ] cm2
7 cm
Total Area of
Composite Figure = [ ]cm2
21 cm

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) = .