16 vectors

Question 1

-How do you show that vectors bisect each other?

Answer 1

-Show that the point of bisection is the midpoint of the line

Question 2

How do you show that AN:NB is in the ratio 2:3?

Answer 2

-Create two paths for AN but using two different unkowns

• Then equate them
• Form simultaneous equations and show the ratio

Question 3

How do you show that points T,S,P lie on the straight

Answer 3

-Show that TS is parallel to is parallel to SP

Question 4

How do you work out the angle between the vector and the x,y,z axis? cosx cosy cosz

Answer 4

for angle between x work out x/magnitude of a
for angle between y work out y/magnitude of a
for angle between k work out k/magnitude of a

Inverse cos