1. Why would knowing the Pythagorean identity sin2x + cos²x = 1 and the sum identities allow you to prove all the other identities you have seen in this
lesson?

Aportion of a line bounded by two points is defined as

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.