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Displacement Vectors finding magnitude of R and theta

  • Thread starter mariner962
  • Start date
  • #1

Homework Statement



The displacement vectors A and B, when added together, give the resultant vector R, so that R= A+B . Use the data in the drawing and the fact that = 29° to find the magnitude R of the resultant vector and the angle θ that it makes with the +x axis.

I am unsure how to find the magnitude of R and theta
 

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  • #2
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Any ideas where to start?
 
  • #3
I know that the angle of 151 degrees is opposite the resultant and that i can use the law of cosines.
 
  • #4
actually i know that i have to find that angle using cosines
 

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