Is it possible to solve this system by substitution? By the Elimination Method? By graphing?
List at least five possible solutions.
Consider the list of solutions you wrote in part (b) as a sequence and write a rule to represent all possible solutions.
Use substitution: cos(x) = −1. Solve for x.
List five values where the graphs intersect.
List your values from part (b) in order and look for a relationship.
x = (−180 + 360n)° for all integers n
Use the eTool below to help answer parts (a) and (b).
Click the link at right for the full version of the eTool: CCA2 7-66 HW eTool