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:

boxplot

the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for