### Home > A2C > Chapter 13 > Lesson 13.1.2 > Problem 13-32

13-32.

Salina, Tamara, and Traci are working on their homework together. Salina tells her friends that she got *θ* = 52° for the inverse cosine problem she is working on and asks if they got the same answer. Tamara says she got* θ* = 128 °, and Traci volunteers her answer of *θ* = 308 °. Is it possible that these are all solutions to the same problem? **Justify** your answer. Homework Help ✎

What is the cosine of each angle?