Vectors

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    test test

    Cards (5)

    • Position vectors
      AB⃗=\vec{AB}= b‾−a‾\underline{b}-\underline{a}
    • If a‾=\underline{a}=xi‾+\underline{x_i}+yj‾+\underline{y_j}+zk‾z\underline{k} then
      ∣a‾∣=\left|\underline{a}\right|= x2+y2+z2\sqrt{x^2+y^2+z^2}
    • Unit vector
      a‾^ =\hat{\underline{a}}\ = 1∣a‾∣a‾\frac{1}{\left|\underline{a}\right|}\underline{a}
    • Angles with axes:
      cos⁡θx=\cos\theta_x= x∣a‾∣\frac{x}{\left|\underline{a}\right|}
    • Angles with axes:
      cos⁡θz=\cos\theta_z= z∣a‾∣\frac{z}{\left|\underline{a}\right|}