![CPM Homework Banner](/dist/7d633b3a30200de4995665c02bdda1b8.png)
Home > PC > Chapter 9 > Lesson 9.2.1 > Problem 9-70
9-70.
Let
Find the exact value of the average rate of change of
from to . Write the expression for the average rate of change of
from to . Use the fact that
to show that the expression in part (b) can be written as . Substitute values for the trigonometric expressions and simplify.