 Hello and welcome to the session. In this session we discussed the following question that says find the projection of vector A on vector B if vector A dot vector B is equal to 8 and vector B is equal to 2i cap plus 6j cap plus 3k cap plus recall how do we find the projection of a vector on the other vector. So projection of vector A on the other vector B is equal to vector A dot vector B upon magnitude of vector B. This is the key idea to be used in this question. Let's proceed with the solution now. We are given vector A dot vector B is equal to 8 and vector B is equal to 2i cap plus 6j cap plus 3k cap. Let's find out the magnitude of vector B. This is equal to square root of 2 square plus 6 square plus 3 square that is we have magnitude of vector B is equal to square root of 4 plus 36 plus 9. From here we get magnitude of vector B is equal to square root of 49. Thus we get magnitude of vector B is equal to 7. Now the projection of vector A on vector B is equal to vector A dot vector B upon magnitude of vector B which is equal to 8 upon 7. So projection of vector A on vector B is 8 upon 7. This is the final answer. This completes the session. Hope you have understood the solution of this question.