What does the square of vector a represent? What is the geometric meaning? Such as the title

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• 1. On the inner product of vector How did the vector inner product formula come from? What's the reason for the inventor to stipulate that, and the vector multiplied by the vector is a constant
• 2. The definition and basic properties of vector inner product, 1. Given vector a = (1, radical 3), vector b = (- radical 3, - 1), find 2. Given points a (x, - 1), B (- 2, - 6), C (1, - 2) and | vector ab | = | vector AC |, find the value of X 3. Given points a (x, 4), B (2, y + 3), and vector AB = (3, 6), find the value of X, y
• 3. What is the inner product of a vector? What's the use?
• 4. The definition of finding the inner product of two vectors 3Q It's on the first floor. Where is it? Inside and outside the points. Do you belong to the inside? What about the outside? Can you tell me? In addition, I'm talking about vectors in linear algebra.
• 5. On a vector product of quantity Given the vector a + vector B + vector C = 0 vector, and the module of a vector = 4, the module of B vector = 3, the module of C vector = 5 Finding a vector x C vector
• 6. On the scalar product of several vectors (1) |a | = 2, B = (- 2,4), and a ⊥ B, then a coordinate of a is_______ (2) Given a = (5,8), B = (2,3), C = (1, - 2), then (a * b) * C=___________ (3) Given that | a | = 8, a * b = - 12, then the number of projections of B in a direction is_____________
• 7. Vector product of higher numbers There are three vectors a, B, C, and their modules are known. When the sum of these three vectors equals to zero vector, the A × B + B × C + C × a, where a × B, B × C, C × a are their vector products
• 8. In high numbers: what is the relationship between arcsinx and SiNx What is the relationship between arcsinx and SiNx What about arccosx
• 9. Arctanx ^ 2 / (SiNx / 2) * SiNx
• 10. High number: limx - π / 2 (2sinx ^ 2-sinx-1) / (SiNx ^ 2 + sinx-2) limit
• 11. What is the outer product of a vector, what is its geometric and arithmetic significance, and how to find it?
• 12. Given the vector | a | = 4 and the vector | B | = 3, the scalar product is obtained under the following conditions: 1 / vector a is perpendicular to vector B 2 / the angle between vector a and vector B is 60 ° 3 / vector a is parallel to B
• 13. The scalar product problem of the first higher vector: we know that the vector a = (1 + √ 3), the angle between B and a is 3 / π, and a * b = 4 It is known that the vector a = (1 + √ 3), the angle between B and a is 3 / π, and a * b = 4 (1) Find the vector B; (2) Let m = a + KB, n = 3ka-2b (k is a positive real number). When m ⊥ n, whether M + N and a are collinear or not is the reason
• 14. If the vector a = (0,3) and the vector b = (- 4,4), then the scalar product of the vectors a and B is?
• 15. To find the coordinate vector, vertical and parallel calculation formula
• 16. How to memorize the formula of the vertical and parallel coordinates of two vectors?
• 17. The resultant force is the vector sum of the product of acceleration and mass of each part of the whole,
• 18. The concept of vector?
• 19. What is the sub vector It's better if it's the concept in the book^_^
• 20. Please help to sort out the vector in middle school physics