Q31 of 138 Page 24

Find and if

(i) and


(ii) and


(iii) and

(i) expanding the given equation


Substituting






(ii) expanding the given equation



Substituting,







(iii) expanding the given equation



Substituting,






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29

If two vectors and are such that and then find the value of

30

If is a unit vector, then find in each of the following

(i)


(ii)

32

Find if

(i) and


(ii) and


(iii) and

33

Find the angle between two vectors and if

(i) and


(ii) and