Simple vectors Q (1 Viewer)

[skillz]

A and B are points defined respectively by the position vector a= i+2j-k and b=-i+j-3k, find the magnitude of the angle between vectors AB and a

AB = -2i-j-2k and mag AB = 3


another q.

C and D are points defined respectively by position vcetors c and d. if |c|=5 |d|=7 c.d=4 find |cd|
thanks.

 

[Raginsheep]

You're from Vic right?

 

[skillz]

Yep... doesn't the nsw course have vectors?

 

[Raginsheep]

Only in the context of complex numbers.

We start on vectors in uni.

 

[skillz]

ah bummer. so iguess no-one can help me out?

 

[Raginsheep]

I'd wait for one of the second year uni students to pop in as they do from time to time.