Q14 of 177 Page 24

If D, E, F are the mid-points of the sides BC, CA and AB respectively of a triangle ABC, write the value of

Let the position vectors of A, B and C be and

Then the position vector of and will be , and respectively.


Any vector , if the position vectors of point A () and B () are known, can be written as .


Then,




More from this chapter

All 177 →
12

If denote the position vectors of points A and B respectively and C is a point on AB such that 3AC = 2AB, then write the position vector of C.

 13

If D is the mid-point of side BC of a triangle ABC such that write the value of λ.

 15

If is non-zero vector of modulus a and m is a non-zero scalar such that m is a unit vector, write the value of m.

 16

If are the position vectors of the vertices of an equilateral triangle whose orthocentre is at the origin, then write the value of .