3 ms·
v · w = 0 was one of the premises. Your version is the more general statement usually called the “law of cosines”. Personally I prefer the geometric algebra ve
by jacobolus 8y ago
v · w = 0 was one of the premises.
Your version is the more general statement usually called the “law of cosines”. Personally I prefer the geometric algebra version:
Given any vectors u, v: (u + v)² = uu + uv + vu + vv = u² + 2u·v + v²
Where u·v = ½(uv + vu) is just the definition of ·.