---
product_id: 61549600
title: "Trigonometry: How Trigonometry Works (In Focus)"
brand: "christine tootilldr. graham lawler"
price: "HK$250"
currency: HKD
in_stock: true
reviews_count: 3
url: https://www.desertcart.hk/products/61549600-trigonometry-how-trigonometry-works-in-focus
store_origin: HK
region: Hong Kong
---

# Trigonometry: How Trigonometry Works (In Focus)

**Brand:** christine tootilldr. graham lawler
**Price:** HK$250
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Trigonometry: How Trigonometry Works (In Focus) by christine tootilldr. graham lawler
- **How much does it cost?** HK$250 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/61549600-trigonometry-how-trigonometry-works-in-focus)

## Best For

- christine tootilldr. graham lawler enthusiasts

## Why This Product

- Trusted christine tootilldr. graham lawler brand quality
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## Description

Trigonometry: How Trigonometry Works (In Focus)

## Images

![Trigonometry: How Trigonometry Works (In Focus) - Image 1](https://m.media-amazon.com/images/I/61+kjOJS5CL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    A Friendly and Helpful Little Book
  

*by P***S on Reviewed in the United Kingdom on 4 March 2011*

The great strength of this book is that it conducts the user in a friendly, clear and accessible way through the whole continuum of trigonometry, from first pre-GCSE principles to full use in A2. So it can be used by those coming with a hazy notion of trig as something to do with rather suspect ladders leaning dodgily against walls of indeterminate height, through to those grappling with the use of identities and harmonic form! Everything necessary for GCSE and A level is covered.As well as the essential clarity of the book, I particularly liked the suggestions for some simple practical activities (e.g., manipulating the angles and dimensions of your room, or finding sine wave patterns in sunset times). The support for more demanding areas of A level is strong and reasoned. The diagrams at first seemed to me rather simple, but then I realised that "uncluttered" was the word I was looking for - no bad thing.This is a little book which I think should enable student, parent, or adult learner to take control and gain a clearer understanding of trigonometry.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Clear guide to trig
  

*by M***R on Reviewed in the United Kingdom on 22 April 2011*

This book is a clear, step-by-step guide to trigonometry, starting right at the beginning and working up to A2 content.  Each principle is introduced with a full explanation allowing the reader to understand where the trig rules and formulae come from, and why they work.  Practical examples and practise questions pepper the book throughout, enabling the student to get to the grips with each new piece of content before progressing to complex problems. I would recommend this book for anyone who wants a strong grasp of trigonometry.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Highly recommended
  

*by J***L on Reviewed in the United Kingdom on 25 September 2011*

The book starts with the basic concepts of trigonometry and gradually works up to more advanced concepts, and thanks to it, my knowledge of trigonometry has increased. There are many worked examples and practical questions, and I've found the questions interesting and achievable. The author's use of English is clear and straightforward, which is important for solving maths problems. I give this book five stars.

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-23*