想玩游戏吗？为什么不同时学习一些三角函数呢？快来吧，三角学大师！
在这个免费游戏中，你可以练习：
- 定位特殊角度（仅限弧度！）
- 求这些角度的正弦、余弦和正切值
- 求与这些角度的输出相关的反正弦，余弦和正切值
游戏会记录你在 28 个级别中最长的正确次数。你在所有级别都是从初学者开始的。当你连续 20 次正确时，你就成为大师了！
单击忍者开始游戏……三角学大师！！
1：函数
2：函数图
3：阅读图表
4：变化率
5：使用函数建模
6：二次函数
7：多项式函数
8：除多项式
9：多项式的零点
10：有理函数
11：多项式和有理不等式
12：复合，一对一和反函数
13：指数和对数函数
14：对数的性质
15：指数和对数方程
16：使用指数函数建模
17：三角函数
18：三角图
19：三角函数（使用三角形）
20：反三角函数
21：三角恒等式
22：三角方程
23：向量
24：向量（应用）
25：向量（点积）
26：序列
27：算术和几何序列
Lesson 1: Functions
Lesson 2: Graphs of Functions
Lesson 3: Reading Graphs
Lesson 4: Rates of Change
Lesson 5: Modeling with Functions
Lesson 6: Quadratic Functions
Lesson 7: Polynomial Functions
Lesson 8: Dividing Polynomials
Lesson 9: Zeros of Polynomials
Lesson 10: Rational Functions
Lesson 11: Polynomial and Rational Inequalities
Lesson 12: Composite, One-to-one, and Inverse Functions
Lesson 13: Exponential and Logarithmic Functions
Lesson 14: Properties of Logarithms
Lesson 15: Exponential and Logarithmic Equations
Lesson 16: Modeling with Exponential Functions
Lesson 17: Trigonometric Functions
Lesson 18: Trigonometric Graphs
Lesson 19: Trigonometric Functions (using Triangles)
Lesson 20: Inverse Trigonometric Functions
Lesson 21: Trigonometric Identities
Lesson 22: Trigonometric Equations
Lesson 23: Vectors
Lesson 24: Vectors (Applications)
Lesson 25: Vectors (The Dot Product)
Lesson 26: Sequences
Lesson 27: Arithmetic and Geometric Sequences
Lesson 1: Adding Integers (整数相加)
Lesson 2: Subtracting Integers (整数减法)
Lesson 3: Multiplying Integers (整数乘法)
Lesson 4: Dividing Integers (整数除法)
Lesson 5: Order of Operations (Part 1) (运算顺序第一部分)
Lesson 6: Order of Operations (Part 2) (运算顺序第二部分)
Lesson 7: Negative Fractions and Decimals (负分数和小数)
Lesson 8: Expressions with Variables (带变量的表达式)
Lesson 9: The Distributive Property (分配律)
Lesson 10: Solving Equations (Part 1) (解方程第一部分)
Lesson 11: Solving Equations (Part 2) (解方程第二部分)
Lesson 12: Ratios and Rates (比率和利率)
Lesson 13: Proportions (比例)
Lesson 14: Percents (Part 1) (百分比第一部分)
Lesson 15: Percents (Part 2) (百分比第二部分)
Lesson 16: Areas of Parallelograms (平行四边形的面积)
Lesson 17: Areas of Triangles (三角形)
Lesson 18: Areas of Trapezoids (梯形面积)
Lesson 19: Circles (圆)
Lesson 20: Review (复习)
Lesson 1: Adding Integers
Lesson 2: Subtracting Integers
Lesson 3: Multiplying Integers
Lesson 4: Dividing Integers
Lesson 5: Order of Operations (Part 1)
Lesson 6: Order of Operations (Part 2)
Lesson 7: Negative Fractions and Decimals
Lesson 8: Expressions with Variables
Lesson 9: The Distributive Property
Lesson 10: Solving Equations (Part 1)
Lesson 11: Solving Equations (Part 2)
Lesson 12: Ratios and Rates
Lesson 13: Proportions
Lesson 14: Percents (Part 1)
Lesson 15: Percents (Part 2)
Lesson 16: Areas of Parallelograms
Lesson 17: Areas of Triangles
Lesson 18: Areas of Trapezoids
Lesson 19: Circles
Lesson 20: Review