Q31 of 93 Page 25

Write the angle between the vectors and .

Given question gives us two same vectors so the angle is


In case, it asks write the angle between the vectors


The angle between the vectors will be 180° as they are equal in magnitude and opposite in direction.


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29

Find a vector of magnitude which is perpendicular to both of the vectors and .

 30

Write the number of vectors of unit length perpendicular to both the vectors and .

 1

Mark the correct alternative in each of the following:

If is any vector, then


2

Mark the correct alternative in each of the following:

If and , then