I am trying to derive the law of signs from the cross product.(adsbygoogle = window.adsbygoogle || []).push({});

First, we have three vectors ##\vec{A} ~\vec{B} ~\vec{C}## such that ##\vec{A} + \vec{B} + \vec{C} = 0##. This creates a triangle. Then, we label the angles opposite the respective sides as a, b, and c. I am not sure where to go from here... We could take the cross product of each combination of ##\vec{A}## and ##\vec{B}##, but these cross products aren't necessarily equal, so can't set them equal to derive the law of sines... Any help would be appreciated.

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# B Deriving law of sines from cross product

Tags:

Have something to add?

Draft saved
Draft deleted

Loading...

Similar Threads - Deriving sines cross | Date |
---|---|

I Landau damping derivation | Feb 6, 2018 |

B Do numbers derived from successive differences have a name? | Dec 14, 2017 |

Derivation of formula for general formula of sine equations | Jun 25, 2012 |

Question about how to derive Sine | Apr 3, 2009 |

Derivative of Sine | Dec 2, 2008 |

**Physics Forums - The Fusion of Science and Community**