Use the definitions of hyperbolic cosine and hyperbolic sine (their formulas) to prove the identity below. Show your work neatly in the space provided.
h2 − h2 = 1

See below

Step-by-step explanation:

By definition:

We want to show that:

We substitute into the left side to get:

We apply exponential rule to get:

We expand:

step-by-step explanation:

. your answer will contain x - and y -terms. (1 point) x ( ¿¿ 2 − 7 ) 2 +( y 2 − 9 ) 2 √ ¿ 12. what is the distance from the directrix (the crocodile river) to the point ( x , y )? write this equation. your answer will contain a y -term.

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation: