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Math Help - can anyone help me with trig? asap?

  1. #1
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    can anyone help me with trig? asap?

    question= two forcesm one of 120 lbs and the other of 200 lbs, act on the same object at angles of 30 degrees and -30 degrees (respectively) with the positive x-axis. find the direction and magnitude of the resultant of these 2 forces
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by kballa View Post
    question= two forcesm one of 120 lbs and the other of 200 lbs, act on the same object at angles of 30 degrees and -30 degrees (respectively) with the positive x-axis. find the direction and magnitude of the resultant of these 2 forces
    we have magnitude and direction, so we should be thinking vectors here.

    draw a diagram showing the Cartesian axis and your vectors.

    Let F_1 be the vector that represents the force of 120 lbs
    and F_2 be the vector representing the 200 lbs

    then the resultant force F is given by: F = F_1 + F_2

    i suppose you will know how to draw these vectors.

    let <x_1,y_1> be the terminal point of F_1

    and <x_2,y_2> be the terminal point of F_2

    so, we would have F = <x,y> = <x_1 + x_2,y_1 + y_2>

    once we have <x,y> we can figure out what is required of us.

    can you continue? do you even know what i am talking about?
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