![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
How to determine the direction of the outer product of a vector!
Right hand rule
Let z = x × y, the module length of Z = x * y * sin (x, y), then x, y, Z form the right hand system, extend the palm of the right hand, and turn the four fingers from the positive direction of X axis to the positive direction of Y axis, then the thumb direction is the positive direction of Z axis
How to judge the direction of vector outer product with right hand frame
The four fingers of the right hand follow the direction of the first vector, and then take the place where the finger and palm are connected as the axis, bend the four fingers so that they coincide with another vector. The bending angle is less than 180 degrees. The direction of the thumb is the outer product direction
Why is the direction of vector cross product determined by the right hand rule
This is because the actual results of a large number of experiments out of a convenient way to judge. Is the wisdom of scientists to help us come up with a method
RELATED INFORMATIONS
- 1. The problem of normal vector The normal vector of space surface, add a negative sign before the vector, or the normal vector of the point? How to judge the positive and negative direction?
- 2. In the basic theorem of calculus, is continuous = integrable?
- 3. The difference between economic law and Commercial Law
- 4. A (cos23, cos67) B (cos68, cos22) finding the vector product of ab
- 5. The formula of divergence for the product of two vectors? ▽· (AB) =? Where AB is a vector. What is the expansion formula of this formula?
- 6. When to use inner product (scalar product, dot product) and outer product (cross product) when multiplying two vectors
- 7. How can tangent vector and normal vector be derived? The tangent vector is t = [1, y '(x), Z' (x)] The normal vector is n = (f'x, f'y, f'z) How are the above two points derived? I only know that the slope k of the point slope is the derivative of Y over X, The tangent vector of a curve, the normal vector of a surface. Why is one tangent vector and the other normal vector?
- 8. Why is normal vector n perpendicular to vector m1m2 and normal vector n perpendicular to vector m1m3, so it can be solved by vector m1m2x and vector m1m3?
- 9. Parallel vectors are collinear vectors, right Why?
- 10. Are collinear vectors parallel or collinear
- 11. How to determine the direction of the vector from the product of two vectors?
- 12. What are the characteristics of traditional culture and art reflected in Sanwang tomb? What kinds of traditional cultural features does the novel of three kings' tomb reflect? What are the artistic features? ------------------------------------------------------------------------------------------------------- If you have a son, you will kill me. If you have a son, you will say, 'go out and look at the Nanshan Mountain, pine on the stone, and the sword is on its back.' "so you are about to see the king of Chu, One male and one female. If the female comes, the male will not come Moxie's son was named Chi and stronger than Hou. He asked his mother, "where is my father?" his mother said, "your father made a sword for the king of Chu in three years. The king was angry and killed him. When he went, he told me: 'Yu Ruzi: go out and look at the south mountain, the pine grows on the stone, and the sword is on his back.'" so he went out and looked south, and there was no mountain. But he saw the pine pillar in front of the hall, and the stone is low above it. He broke his back with an axe and got the sword Wang dreamt of a son with a wide eyebrow. He said he wanted revenge. The king bought his daughter. When he heard of it, he died. When he went to the mountains, he sang (11). When the guest met (12), he said, "my son is young. Why do you cry so sad?" he said, "I'm a good general and moxizi. When the king of Chu killed my father, I want to repay him!" the guest said, "I heard that the king bought his daughter's daughter, and brought his son's head and sword to repay him." the guest said, "fortunately!" he committed suicide, holding his head and sword in both hands, Li Jiang (13). The guest said, "I will not bear the son" (14), "so the corpse is a servant (15) The guest held his head and went to see the king of Chu. The king was very happy. The guest said, "this is the head of a warrior. It should be cooked in a soup pan (16)". As the king said, the first three days and three nights of cooking are not rotten. The head comes out of the soup (17), and the eyes get angry (18). The guest said, "this head is not rotten. May the king come to see it "The king is coming." the guest imitates the king with his sword (19), and the king's head falls into the soup. The guest also imitates his own head, and his head falls into the soup again. The three pieces are all rotten and can't be identified. They are buried separately in the soup and meat, so they are called "three kings' tomb". Now they are in Yichun county (20) -----------------------------------------------------------------------------------------------------------
- 13. What are the advantages and disadvantages of online market research methods compared with traditional market research methods?
- 14. The left hand rule and the right hand spiral rule What rules are used under what circumstances? What do the four fingers, thumb and palm of each rule represent? What changes do the left and right hands follow? Under what conditions can the rules be formed?
- 15. Why are there left-hand spiral rule and right-hand spiral rule?
- 16. How to prove the multiplication rule of block matrix? Who can write down the proof process, or take photos and upload it
- 17. It is known that square matrix A of order n satisfies A2 + 2a-3e = 0. It is proved that a is invertible and the expression of inverse distance matrix of a is given
- 18. How to prove that only square matrix can have inverse matrix
- 19. The process of proving the formula of 2 times 2 inverse matrix algorithm A = ad-bc of D B = - ad-bc of B C = - ad-bc of C D = ad-bc of a,
- 20. How to solve inverse matrix of fourth order matrix