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Vectors question

I've been given the following. The angle ACO is 15 degrees and BCO is 30 degrees. The O is meant to be the origin not a length.

Find the lengths of OB and OC, done that 1+13(23) 1+\frac{1}{3}(2\sqrt3) and 2+3 2+\sqrt3 respectively. Then I'm asked to find the coordinates of vectors AB AC and BC.

Now I'm not too sure on this part, as I haven't been given any points. All I've managed to do is rewrite it as OB-OA etc.
Reply 1
Avatar for DFranklin
DFranklin
18
Original post by Music99
I've been given the following. The angle ACO is 15 degrees and BCO is 30 degrees. The O is meant to be the origin not a length.

Find the lengths of OB and OC, done that 1+13(23) 1+\frac{1}{3}(2\sqrt3) and 2+3 2+\sqrt3 respectively. Then I'm asked to find the coordinates of vectors AB AC and BC.

Now I'm not too sure on this part, as I haven't been given any points. All I've managed to do is rewrite it as OB-OA etc.
The question is impossible to answer given the information posted.

[You must have been given more information than you have posted or you wouldn't have been able to find the lengths OB and OC.]
Reply 2
Avatar for aznkid66
aznkid66
1
Um, this is a duplicate thread of:

http://www.thestudentroom.co.uk/showthread.php?t=2313111

And yeah, the extra info was that A is on the x-axis, B is on the y-axis, and C is on the z-axis.
Reply 3
Avatar for Music99
Music99
OP
4
Original post by DFranklin
The question is impossible to answer given the information posted.

[You must have been given more information than you have posted or you wouldn't have been able to find the lengths OB and OC.]


Hi, yes sorry this is a duplicate thread of http://www.thestudentroom.co.uk/showthread.php?t=2313111&p=42129477

A is on the x- axis B on the y and C on the z.

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