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Add/Sub. of vectors

  1. Aug 24, 2011 #1
    Vector A has a magnitude of 12 (in some unspecified unit) and makes an angle of 27 with the x-axis, and a vector B has a lenght of 22 and makes an angle of 72 with the x-axis. Fnd the components of the vector C in the following:

    (a) C=A+B

    Cx=

    Cy=

    (b) C=A-B

    Cx=

    Cy=
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Aug 24, 2011 #2
    you can solve it using the law of sines and the law of cosines, but i prefer solving it with components

    Vx=VxA+VxB
    Vy=VyA+VyB


    both make acute angles to the x-axis, so dont worry, just use those angles, but if you had something like, ''it makes a -30 degree angle with the y-axis'' (meaning it is 330 degrees in the unit circle) you have to use the 330, ALWAYS THE WHOLE WAY AROUND.


    know you have a big resulting triangle, try to continue yourself in the operations...
     
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