Welcome :: Homework Help and Answers :: Mathskey.com
Welcome to Mathskey.com Question & Answers Community. Ask any math/science homework question and receive answers from other members of the community.

13,435 questions

17,804 answers

1,438 comments

97,166 users

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

0 votes
1. 8i+9i, -2i+7j
asked Jul 17, 2014 in TRIGONOMETRY by anonymous

1 Answer

0 votes

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

Caliculate the angle between two vectors by using the following formula

image

Let

image 

image

Calculate the dot product of the given vectors

image

     image

    image

Calculate the magnitudes of the vectors.

image

    image

    image

image

    image

     image

image

        image

         image

         image

image

image

Therefore angle between the vectors is image
 

answered Jul 17, 2014 by david Expert

Related questions

asked Jun 14, 2014 in PRECALCULUS by anonymous
...