SOLUTION: Could you find the angle between the vectors of {{{ U }}} = 7i + 2j and {{{ V }}} = -4j? Thanks.

Algebra ->  Trigonometry-basics -> SOLUTION: Could you find the angle between the vectors of {{{ U }}} = 7i + 2j and {{{ V }}} = -4j? Thanks.       Log On


   

Question 1075702: Could you find the angle between the vectors of +U+ = 7i + 2j and +V+ = -4j? Thanks.
Answer by ikleyn(52790) About Me  (Show Source):
You can put this solution on YOUR website!
.
See the lessons
    - Introduction to dot-product
    - Formula for Dot-product of vectors in a plane via the vectors components
    - Dot-product of vectors in a coordinate plane and the angle between two vectors
    - Solved problems on Dot-product of vectors and the angle between two vectors
in this site.

They explain what is dot-product and how to use it to find the angle between vectors in a coordinate plane.


Also,  you have this free of charge online textbook in ALGEBRA-II in this site
    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic
"Dot-product for vectors in a coordinate plane".