V.
Trigonometric ratios

1.
Trigonometric ratios
01.
Trigonometric ratios
02.
Values ​​of trigonometric ratios

2.
Applications of trigonometric functions
01.
Applications of trigonometric functions (1)
-Find the length
02.
Applications of Trigonometry (2)
-Finding the area

Advanced Lecture (In-depth study of the entire chapter)
TOPICS 1.
Graph of/
TOPICS 2.

Math Essay (Seeing the World Through Mathematics)
01 Study of Trigonometry in History

Ⅵ.
Properties of a circle

1.
Circles and lines
01.
The current of the circle
02.
Tangent of a circle

2.
central angle
01.
central angle
02.
Application of central angle (1)
-Circle and square
03.
Application of central angle (2)
-Angle formed by a tangent and a chord

Advanced Lecture (In-depth study of the entire chapter)
TOPICS 1.
Is there an equation that represents a circle?
TOPICS 2.
Length of common chord and common tangent
Math Essay (Seeing the World Through Mathematics)
01 Apollonian Gasket

Ⅶ.
statistics

1.
Representative value
01.
Representative value

2.
Scatterplot and correlation
01.
Variance and standard deviation
02.
Correlation

Advanced Lecture (In-depth study of the entire chapter)
TOPICS 1.
Another way to find variance
TOPICS 2.
The mean, variance, and standard deviation of
Math Essay (Seeing the World Through Mathematics)
01 Don't fall into the trap of statistics!

If you have a firm grasp of the concept, you won't be afraid of any problem!

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When you learn addition, you learn subtraction through addition, and when you learn multiplication, you learn division through multiplication.
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[Structure of the Concept Basics]

▷ Concept Book
- Self-directed learning style explanations that are easy to understand by asking and answering concepts, and step-by-step structure to improve thinking skills.
- Thematic association learning that organizes concepts through the flow of Q
- Includes various problems related to the concept
- Advanced Lecture that further expands the concept
- The world seen through mathematics, containing stories of mathematics in the world

▷ Test Book
A wide range of questions from basic to advanced level for internal exam preparation.

▷ Commentary BOOK
Friendly commentary that explains the hidden meaning in detail