Geometry and Trigonometry

Volumes, perimeters, angles, identities, triangles, sin, cos, tan.

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  1. melman

    Math help

    melman, Apr 20, 2020
    Replies:
    1
    Views:
    512
    hendry1
    Apr 21, 2020
  2. cpwang

    How To Define A Flat Plane: The fruit of reinventing wheels when studying Euclidean geometry

    cpwang, Jan 2, 2019
    Replies:
    0
    Views:
    913
    cpwang
    Jan 2, 2019
  3. redapplesonly

    Using arctan to find an angle... in an unusual coordinate system...

    redapplesonly, Jan 12, 2018
    Replies:
    0
    Views:
    814
    redapplesonly
    Jan 12, 2018
  4. DropDeadFred

    The Sine Law question

    DropDeadFred, Nov 4, 2017
    Replies:
    0
    Views:
    544
    DropDeadFred
    Nov 4, 2017
  5. Xarzu

    A Simple Trigonometry question about Cosines

    Xarzu, Sep 26, 2017
    Replies:
    0
    Views:
    531
    Xarzu
    Sep 26, 2017
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