Wei wei wei ... you're getting more and more careless!

=

= !

**UNIT VECTOR** in the direction of

=

What did Miss Loi just said in the previous comment?! Grrr...

]]>anyway BA = OA - OB, OB = OA - BA

OB = (-75)

( 12)

So

=

=

=

So can you get from here? Don't forget to express the final answer in *unit vector* coz that's what the question asked for. Too many students have lost valuable marks here simple coz they didn't read the question properly.

Don't anyhow 'flip' again! Know your directions well!

]]>( 8 )

(-15)

by flippin it to ( -15)

( 8 ) you 'flipped' wrongly here!

Then 1/(root square of [ (8^2) ( -15^2)]

and we'll get 1/17. Now 1/17 x (-15) x 85

( 8)

OA = (-75)

(40 )

from here OB is no biggie yes? ps: i dun see whats wrong wit my workings and sry abt de format cant seem to install the plugin ya recommanded ]]>

You need to understand the concept of unit vectors well before you do this question.

Miss Loi would like to look at your workings. Check out this post on how to display mathematical symbols in comments.

Do check out the syntax guide and test out your equation first before posting here!

]]>OA = (-75)

(60)

OB = (-110)

(123 )