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20 July, 10:38

Find the magnitude and direction of the vector. Round the length to the nearest tenth and the degree to the nearest unit. Diagram is not drawn to scale.

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  1. 20 July, 10:54
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    The diagram shows the coordinates of the vector. They are:

    East-coordinate = 6

    North-coordintate = 4

    A) To find the magnitude you just use Pythagorean theorem:

    c^2 = 6^2 + 4^2 = 36 + 16 = 52 = > c = √52 = 7.21

    7.21 rounded to the nearest tenth is 7.2

    B) To find the direction find the angle using trigonometric ratios:

    tan (angle) = 4/6 = 2/3 = > angle = arctan (2/3) = 33.69 degrees

    That is 33.69 degrees North of East, which is written N 33.69° E
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