Which set of ordered pairs does not represent a function? (0, 0), (2, 2), (5, 5)
(0, 1), (3, 4), (4, 3)
(1, 2), (3, 2), (7, 2)
(2, 3), (3, 5), (3, 7)

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) = .

100 points? me its important ‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️

Tamar is measuring the sides and angles of tuv to determine whether it is congruent to the triangle below. which pair of measurements would eliminate the possibility that the triangles are congruent