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4 April, 04:46

Find the magnitude and direction angle for the vector v = 3 cos 123°i + 3 sin 123°j.

A. 3√2, 57°

B. 3√2, 123°

C. 3, 57°

D. 3, 123°

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Answers (1)
  1. 4 April, 06:59
    0
    The vector written in its generic form is given by:

    v = lvl cos theta ° i + lvl without theta ° j

    Where.

    lvl: magnitude of the vector

    theta: angle of the vector with respect to the x axis.

    For this case we have the following vector:

    v = 3 cos 123 ° i + 3 without 123 ° j

    Where,

    lvl = 3

    theta = 123 °

    Answer:

    The magnitude and direction angle for the vector v is:

    D. 3, 123 °
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