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Math Help - Pre-cal/trig

  1. #1
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    Pre-cal/trig

    I'm currently doing a packet for a final I have soon, there are a few questions that I'm not too sure of the answer for...

    1. Find the components of a vector with the given initial and terminal points. Write an equivalent vector in terms of it's components.

    P1 (4,-2); P2 (-3,-3)



    2. Find the horizontal and vertical components of each vector. Write an equivalent vector in the form "v = a1i + a2i"

    Magnitude = 4, Direction angle = 15PI/8
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  2. #2
    Senior Member eumyang's Avatar
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    Quote Originally Posted by hhforever View Post
    I'm currently doing a packet for a final I have soon, there are a few questions that I'm not too sure of the answer for...

    1. Find the components of a vector with the given initial and terminal points. Write an equivalent vector in terms of it's components.

    P1 (4,-2); P2 (-3,-3)
    If you have a vector with an initial point (x1, y1) and terminal point (x2, y2), then the vector would be defined as
    v = <x2-x1, y2-y1>

    2. Find the horizontal and vertical components of each vector. Write an equivalent vector in the form "v = a1i + a2i"

    Magnitude = 4, Direction angle = 15PI/8
    Given a vector with magnitude |v| and direction angle θ, then the components of the vector are given as
    <|v|cos θ, |v|sin θ>
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