From fb12565545a31753cdb545b9a1e8ee3a650bbb03 Mon Sep 17 00:00:00 2001 From: Andrew Lorimer Date: Thu, 18 Oct 2018 10:10:21 +1100 Subject: [PATCH] vector projections (2d) --- spec/vectors.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/spec/vectors.md b/spec/vectors.md index 86bd95b..f832af7 100644 --- a/spec/vectors.md +++ b/spec/vectors.md @@ -97,3 +97,7 @@ If $\vec{a} \cdot \vec{b} = 0$, then $\vec{a} \perp \vec{b}$ (since $\cos 90 = 0 ## Finding angle between vectors $$\cos \theta = {{\vec{a} \cdot \vec{b}} \over {|\vec{a}| |\vec{b}|}} = {{a_1 b_1 + a_2 b_2} \over {|\vec{a}| |\vec{b}|}}$$ + + +## Vector projections + -- 2.47.1