Find the angle between the pair of vectors to the nearest tenth of a degree.

Question

1. 8i+9i, -2i+7j

Answer 1

The vectors are 8i + 9j and - 2i + 7j

Caliculate the angle between two vectors by using the following formula

Let

 

Calculate the dot product of the given vectors

    

   

Calculate the magnitudes of the vectors.

   

   

   

    

       

        

        

Therefore angle between the vectors is