Vectors help, and correction

[learner123]

Hi everyone,


I am still doing my exam revision questions and I am having trouble with question 9 and I would like yous also to look at my question 8 working out , if it is correct. OK here is my attempted to question 9. I don't believe it is the correct way to do it.


Kindest Regards,

 

[Denis]

In #9, line AB is the hypotenuse of a right triangle with legs 4+4=8 and 5-3=2

The rest of your stuff gives me a headache...