How to learn trigonometry without a foundation

To be practical, read the book first, understand the things in the book, and then start to do the questions, at least take the previous test questions again.

The basic things are in the textbooks, and the in-depth things are in the test papers, and practice brings true knowledge!

QQ Learning Network may be able to learn.

Summary. Summary of the knowledge points and test points of acute angle trigonometric functions in the 2021 high school entrance examination, and comprehensive application of solving right triangles.

If you don't have a foundation in junior high school, you need a foundation.

I've seen that, and I want you to tell me about <>

What is the foundation for learning trigonometric functions? Answer: If Li Jiao has no foundation in junior high school, he needs to re-learn triangles and triangle function formulas.

The foundation of the Pythagorean theorem is needed.

The 2021 high school entrance examination acute angle trigonometric function knowledge points and test points are summarized, and Wang Lu solves the right angle triangle seepage and comprehensive difficulty.

This is a very complete knowledge point I found about the triangular thick chain pin function, you take a look at it first, and you need to memorize it. Then find a simple rock tour to do the basic questions of Zhaoqing, and slowly check and fill in the gaps.

What foundation do you need to learn trigonometry? Answer: Properties, definitions, ranges, formulas, Pythagorean theorem of trigonometric functions.

If you encounter a question that you don't know, ask it again, so that you can make it up slowly.

Is it difficult to complement the basics of trigonometric functions? I want to learn trigonometric functions, but I don't know if I can learn it.

Yes, you can learn if you want to, believe in yourself, believe in yourself, believe in yourself <>

<> work hard to learn first, and then talk about whether it is difficult or not.

I want to learn, but I can't find someone to teach <>

You can come to me, I can teach you more details.

Don't you have to spend money? I think of the kind that can learn all trigonometric functions.

There's nothing embarrassing between us, this can teach you all day long, I feel it's a good deal, I can help you summarize the knowledge points of your notes privately, and then memorize it yourself, and ask me if you don't know the question.

You think about it.

Trigonometry is learned in middle school and is one of the basic knowledge leading to the field of mathematics. Trigonometry is the content of the ninth grade of middle school mathematics. Including sine, cosine, and tangent.

Trigonometric function is one of the basic elementary functions, which is a function in which the angle (the most commonly used radian system in mathematics, the same below) is the independent variable, and the angle corresponds to the coordinate of the intersection point of the terminal edge of any angle with the unit circle or its ratio letter as the dependent variable. It can also be defined equivalently in terms of the length of the various line segments related to the unit circle.

Trigonometric Function Knowledge Points:Sine (sin): The opposite side of angle A is slower than the upper hypotenuse.

Cosine: The adjacent edge of the angle is more hypotenuse than the upper side.

Tangent (tan): The opposite side of the angle a is compared to the adjacent side of the upper Wangtan mode.

Cotangent (cot): The adjacent edge of the angle is compared to the opposite edge.

secant: The hypotenuse of angle A is greater than the adjacent edge.

Cosecant (csc): The hypotenuse of the angle is more than the top side.

Look at the math textbook for the third grade of junior high school from the bookstore.

It has acute trigonometry on it.

Find another math textbook for the first year of high school. It has the basic formula of trigonometric functions on top of it.

First, define the theorem.

Second, commonly used formulas.

Three, three basic function images.

Fourth, the use of image memory properties.

Fifth, there are small example questions and small practice questions at the end of each chapter of the textbook. Don't ignore it! They are a springboard and a bridge to solve puzzles.

Sixth, if you need to calculate a certain number of trigonometric function values on a certain occasion, you can use (even if) the calculator on your mobile phone to find out.

However: the trigonometric value of the common angle, it must be memorized. (30, 45, 60 °).

As the saying goes: There is nothing difficult in the world, only those who are afraid of it.

First, get to the bottom of the basics.

The main trigonometric functions are sine, cosine, tangent, cotangent, secant, secant, and cosecant.

For the above six functions, the analytic formula, the domain and the value range are recalled.

For the above six functions, periodicity, parity, maximum, and (minimum) are recalled.

For the above six functions, the intersection points with the x-axis and y-axis are recalled and written respectively.

For the above six functions, recall and draw images separately.

For the following concepts, the formula should be memorized on the basis of understanding, and the understanding should be deepened on the basis of memory, and the formula should know the origin.

1: The basic relationship between several trigonometric functions.

2. Several trigonometric functions in each quadrant of positive or negative.

3. The function of several trigonometric functions with special angles.

4. Trigonometric function of the sum of two angles (difference).

5. Trigonometric function of doubling angle (half angle).

6. Trigonometric function product sum difference, and difference product.

7. Corner relationship, sine theorem, cosine theorem, tangent theorem.

8. Half-angle formula.

There are also inverse trigonometric concepts, images, and formulas.

Then, after clarifying the above concepts, it is difficult to explain which questions can be done with good results.

That's how I guided my grandson to learn this way, and it worked well.