Instruct: Classify an Amazon review as either positive or negative.
Query: Frustrating and Incomplete

This text was required for my university Trig class. Other reviewers have argued that math text books are only supplemental to the material covered in class - that it's the teacher that makes the difference. If that's the case, without a good teacher, this book is nearly useless. Whether the authors are covering fundamentals or advanced concepts/calculations, most everything gets a very cursory, succinct treatment. Should you not understand something covered in class, this text likely will not help to clarify. If you are at all unfamiliar with Trigonometry (as I was going in to this class), this text is not intended to enhance your understanding.