Angle Between Two Lines: Formula in terms of Slopes

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    mes

    Published on May 28, 2021
    About :

    In this video I go over quick derivation of a formula for the angle between two intersecting lines, and derive it such that it is in terms of the slopes of the lines. The interesting part of this formula is that it mirrors the tan(x – y) trigonometric identity formula which I solved in my last video. The derivation involves first writing the angle between the two lines in terms of the angles of the two line that are made from the horizontal axis. From here we can apply the tan(x – y) trigonometric identity and realize that the tangent terms are equivalent to the two slopes! This is a very interesting formula about the angle between two lines, and I will be using it in my later videos so make sure to watch this video!

    Download the notes in my video: https://1drv.ms/b/s!As32ynv0LoaIhvhVGC9xXbEcjaCi6w

    View video notes on the Hive blockchain: https://peakd.com/mathematics/@mes/video-notes-angle-between-two-lines-formula-in-terms-of-slopes

    Related Videos:

    Trigonometric Identity: tan(x +/- y): Proof: https://youtu.be/aUkEuD2Vdms
    Equation of a Line - A Simple Explanation: http://youtu.be/a3ntO-xNN5M
    Tangent and Secant Lines: http://youtu.be/9E6fBySBsYw .


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