Take an example to visually memorize the cross product:
Quoted from - vector product_Baidu Encyclopedia (baidu.com)
In this formula, we can clearly see that the three terms are i, j, k. In front are their coefficients. We can directly regard i, j, k as x, y, z (just as, but in fact they are unit vectors on the xyz axis). The coefficients in front of each item correspond to ijk respectively. If the back is i, there is no front , that is, there is no x. Similarly, there is no y in front of j, and there is no z in front of k. As for who subtracts the coefficient of each item, it should be seen according to the determinant written below,
Write i, j, k in the first row of this determinant.
The second line writes the vector in front of the product, and writes the vector behind it at the end.
How is the determinant calculated?
This is the cross product of vectors.