Choose the equation of the horizontal line that passes through the point (−5, 1). (1 point)

a
y = −5

b
x = 1

c
y = 1

d
x = −5

Find the solutions for a triangle with a =16, c =12, and b = 63º

Convert 2000 swiss francs to dutch guilders

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) = .