Homework Helpers: Trigonometry

Name: Homework Helpers: Trigonometry
Price: 19.99 USD
Availability: InStock
Rating: 4.2 (18 reviews)
Author: Denise Szecsei

by Denise Szecsei

Nonfiction Self Help

4.2 (18)

235 pages~3.9 hr readPublished by Career PressPublished 2006-01-01

$19.99At peak price

Last checked: Jun 1, 2026

Price history: $0.50 – $19.99

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Perfect for you if...

You're stuck on trigonometry and need someone to explain the concepts without the academic jargon that makes your textbook feel impossible.
You're preparing for AP exams and want a teacher's perspective on what actually gets tested and how to approach it.
You help students with homework and need a reliable reference that covers both the algebra and geometry sides of trig.

Maybe not for you if...

You're looking for a comprehensive textbook replacement with hundreds of practice problems and answer keys.
You prefer learning through videos or interactive tools rather than reading explanations on the page.
You already have a strong grasp of trigonometry and need advanced material beyond the standard curriculum.

About this book

Homework Helpers: Trigonometry by Denise Szecsei covers the core topics found in a typical trigonometry course. The book addresses concepts with both geometric and algebraic components, including the unit circle, trigonometric functions, inverse trigonometric functions, identities, graphical analysis, and applications. The book also reviews the algebraic and geometric foundations underlying trigonometry. Written by an experienced teacher with a PhD in mathematics, it is designed to support students working through trigonometry coursework, those preparing for AP courses, or anyone looking to strengthen their trigonometry skills.

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Price History

Kindle price over time. Green zones = periods when the book was free.

$0.50 – $19.99

Price has dropped 21 times over the last 3 years. Goes on sale roughly every 46 days. Typically stays discounted for 22 days.

Sales Rank

Amazon sales rank: lower number = better selling book. #1 is the bestseller.

Currently around #140K in the Kindle store — a niche title. Climbing the charts — 58% improvement recently.

Rating & Reviews

Purple line = star rating over time. Blue area = total review count growth.

Currently 4.2★ from 18 reviews

Review activity has been quiet recently. Rating has dipped slightly from 4.2 to 4.1.

Sale Prediction

Actual Predicted

This book goes on sale roughly every 46 days. Next drop estimated in about 3 weeks. Typical discount: 97% off.

Prices shown in USD from Amazon US. We continuously pull new data to improve tracking. If dates look old, it usually means there has been no significant change since the last data point.