Limits of Trigonometric Functions
Precalculus: Graphs and Models, 5th Edition
Until the s, the so-called spiral nebulae were believed to be clouds of dust and gas in our own galaxy, some tens of thousands of light years away. Then, astronomer Edwin Hubble proved that these objects are galaxies in their own right, at distances of millions of light years. Today, astronomers can detect galaxies that are billions of light years away. Distances in the universe can be measured in all directions. As such, it is useful to consider distance as an absolute value function.
A Test. Ch 4 Trig Test 1. Trig test 2 chapter 4 and chapter 6 material. Ch 1A Test. Ch 1B Test. Ch 2 Test.