Please help! I need this answered ASAP!!

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) = .

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Complete the input-output table for the linear function y = 3x. complete the input-output table for the linear function y = 3x. a = b = c =