Given the triangle below, what is mza, rounded to the nearest tenth? B
8
10
A
С
12
Triangle not drawn to scale
A. 55.8
B. 2.2
C. 60.4°
D. 58.2

Volume of cylinder with a radius of 8cm and height of 25 cm

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

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) = .