4. which of the following ordered
pairs represent points that lie on a
horizontal line?
® (-2,3), (-5,3)
® (2,3), (-2, 4)
© (-2, 3), (-2, 4)
d (2, -3), (5,3)
how do you find the ordered pairs lying on the horizontal line?

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) = .

Put the equation in slope intercept form by solving for y

What is the measure of sty in oo below? 130 310 230 50