Which phrase best describes this polygon? concave nonagon

concave octagon

convex nonagon

convex octagon

Need ! easy 6th grade work! i will put as much points as i can! you so much! i’m learning this in math and it’s soo

What point is the projection of q on a) r b) s c) t

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) = .