lex asked in Science & MathematicsMathematics · 6 months ago

need help with trigonometry question  ?

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  • ?
    Lv 6
    6 months ago

    With max magnification still can not read your text. So sad.

  • 6 months ago

    First you need to find r, the distance from the origin. This is easily done via the pythagorean theorem since you have both a real coefficient (a = 3) and an imaginary one (b = -4).

    Then you need the angle. This can be found with the inverse tangent function since you have the two non-hypotenuse sides of a triangle. tan(x) = opp/adj = a/b

    So x = arctan(a/b)

  • ted s
    Lv 7
    6 months ago

    z = 3 - 4 i ≈ 5  e^(-53.13[π/180] i)....angle is ≈- 53.13°

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