Question

Vector question - continue...

Answer 1

Here we go. Explaining the solution for (bii)
@amistre64 @shivam_bhalla @radar

Answer 2

Straightforward:
In part b, ii solution is very straight forward.
Fiirst they use triangular law
We know OM, and MN
MP = (lambda)(MN) --> MP and MN lines are parallel to each other

Answer 3

Since P lies on MN , MP // MN . This is the alternative solution!!!!!

Answer 4

Since OP // (AB× AC) See OP is perpendicular to plane ABC and AB x AC=vector 2 is also perpendicular to plane ABC . Since vector 2 is also parallel to OP

Therefore

OP = (lambda) ( AB x AC)

This is based on the priciple that all parallel lines can be related as

A||B

A= (lamba)B where lambda is a constant.

I hope you get it now @ Callisto.

Answer 5

OP is perpendicular to plane ABC <- how did you know?

Answer 6

Since P lies on OG and G is the projection of Vector O on plane ABC and as I told you before, projection of any point on a plane is drawing a perpendicular line from the point to the plane

Answer 7

@amistre64 , please reply here because I want to give you another medal for your hard work.

Answer 8

Unfortunately, I can only give one medal for each post :(
@shivam_bhalla Why is coefficient of i equal to negative coefficient of k?

Answer 9

looks like continuation of previous question??

parallel vectors have proportional components!!

Answer 10

((3-L)/6) : 1 = (L/3): -1 to be exact

Answer 11

Thanks @experimentX for answering. Just abut to write that but my hands are aching

Answer 12

*about

Answer 13

BTW where is the original question??

Answer 14

Ouch... I see it... ratio of two // vectors... Thanks!
@experimentX Original question: http://openstudy.com/study#/updates/4f9945b9e4b000ae9ecebe7d

Answer 15

@shivam_bhalla Sorry :(

Answer 16

Question is here

Answer 17

@Callisto , no problem. :D

Answer 18

looks like not an easy question.

Answer 19

@experimentX Certainly not

Answer 20

hehe ... projection from a point on a plane is a perpendicular line.

Answer 21

13 marks... about 19.5 minutes to do it :S

Answer 22

it gonna be difficult if you've not faced similar question before.

Answer 23

Hmm. So I'm gonna die tomorrow :S

Answer 24

well, is there still problem?? with this question??