This figure is formed by a rectangle and a semi-circle. 3 in
7 in
What is closest to the perimeter of this figure?
O 85 in
O 35 in
0 24 in
0 31 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) = .

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

Analyze the diagram below and complete the instructions that follow. how to find tan