Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A teacher's opinion

I am not impressed by this textbook. My Trig students use selected chapters of this book and so far I have had the most difficulty with Chapter 4: Trigonometric Functions. The topics are misordered. For example, 4.2 introduces the idea of domain and period of sine and cosine, but students do not actually graph the functions until 4.5 (approximately one week later)! Students have to learn unit circle values beginning in 4.2, but the tricks for memorizing these values are withheld until 4.4. Another problem I've encountered is the example problems which sometimes skip steps that are not obvious. This is difficult for students to follow, especially when teachers encourage them to show all work. Overall, I would not recommend this text.