Trigonometry for Dummies

Make trigonometry as easy as 1-2-3

Believe it or not, trigonometry is easier than it looks! With the right help, you can breeze through your next trig class, test, or exam and be ready for your next math challenge. In Trigonometry For Dummies, you'll learn to understand the basics of sines, cosines, and tangents, graph functions, solve tough formulas, and even discover how to use trig outside the classroom in some cool and interesting ways.

Ditch the confusing jargon and take a plain-English tour of one of the most useful disciplines in math. In this lifesaving guide, you'll learn how to:

• Graph trig functions, including sine, cosine, tangent, and cotangent functions
• Understand inverse trig functions and solve trig equations
• Relate triangles to circular functions and get a handle on basic identities

So, whether you're looking for an easy-to-use study guide, to boost your math grade, or get a refresher on some basic trig concepts after a long absence from studying, Trigonometry For Dummies is your ticket to understanding the mathematical mysteries of the triangle.

讓三角函數變得像1-2-3一樣簡單

無論你相信與否，三角函數比看起來更容易！在得到正確的幫助下，你可以輕鬆應對下一堂三角函數課、考試或測驗，並準備好迎接下一個數學挑戰。在《三角函數入門》中，你將學習理解正弦、餘弦和正切的基礎知識，繪製函數圖形，解決複雜的公式，甚至發現如何在課堂之外以一些有趣的方式應用三角函數。

拋棄令人困惑的術語，以通俗易懂的方式探索數學中最有用的學科之一。在這本救命指南中，你將學習如何：
- 繪製三角函數圖形，包括正弦、餘弦、正切和餘切函數
- 理解反三角函數並解決三角方程
- 將三角形與圓函數相關聯，並掌握基本恆等式

因此，無論你是在尋找一本易於使用的學習指南，提高數學成績，還是在長時間不學習後需要對一些基本的三角概念進行複習，《三角函數入門》都是你理解三角形數學之謎的通行證。

Mary Jane Sterling is the author of Algebra I For Dummies, Pre-Calculus Workbook For Dummies, Algebra II For Dummies, and oodles of other Dummies titles. She was a Professor of Mathematics at Bradley University in Peoria, Illinois, for more than 35 years, teaching algebra, business calculus, geometry, and finite mathematics.

Mary Jane Sterling是《Algebra I For Dummies, Pre-Calculus Workbook For Dummies, Algebra II For Dummies》等多本Dummies系列書籍的作者。她在伊利諾伊州皮奧里亞的布萊德利大學擔任數學教授超過35年，教授代數、商業微積分、幾何和有限數學。