Vector Addition - Grade 12

  • Thread starter smittyj
  • Start date
  • #1
smittyj
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Homework Statement


A land surveyor walks 5200m @ 330 degrees and then turns and goes an additional 3000m @ 180 degrees. Find his final displacement using the law of sines/cosines.



Homework Equations


I know the law of sines is a/sinA = b/sinB = c/sinC, and the law of cosines is a^2=b^2 + c^2 - 2bc cos A. I just don't know how to get started.



The Attempt at a Solution


I have no attempt at this solution except for a picture.
 

Answers and Replies

  • #2
JaredJames
2,817
22
Have you drawn a diagram? If that is your picture, why don't you post it.
 
  • #3
ashishsinghal
462
0
just a suggestion. if you have problems in adding vectors then:
you can resolve each vector in x -y axis and then add them, it may help
 
  • #4
hologramANDY
16
0
It looks like you need to draw a triangle with the information given. You are given an angle and two side lengths. From there you should be able to apply one of those laws.
 
  • #5
ashishsinghal
462
0
yeah, that is the way. go on
 
  • #6
hologramANDY
16
0
Where are you getting stuck? If you can get that far you are almost done.
 
  • #7
JaredJames
2,817
22
hologramANDY and ashishsinghal, please note the OP hasn't been back since making the post.

You both seem to be speaking to each other. Take note of the OP's name and I'd recommend waiting for a response before endlessly posting in this thread.
 

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