What is the cosine ratio of ZZ?
х
16
Y
12
Z
20

What is the value of x in the diagram below?

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

Complete the steps to find 4.830 ÷ 5