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| author | standenboy <standenboy@seacrossedlovers.xyz> | 2023-12-15 10:19:20 +0000 |
|---|---|---|
| committer | standenboy <standenboy@seacrossedlovers.xyz> | 2023-12-15 10:19:20 +0000 |
| commit | 4a95719d58a708ad55b1389631d6339047f786a0 (patch) | |
| tree | 26cb6fc2dbe7fa75f57f1d6fb13aff8955772b56 /maths/MUSTKNOW | |
added existing work
Diffstat (limited to 'maths/MUSTKNOW')
| -rwxr-xr-x | maths/MUSTKNOW/cosineRule | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/maths/MUSTKNOW/cosineRule b/maths/MUSTKNOW/cosineRule new file mode 100755 index 0000000..a57f4f7 --- /dev/null +++ b/maths/MUSTKNOW/cosineRule @@ -0,0 +1,11 @@ +trig rule, used to find missing sides on a triangle + +a^2 = b^2 + c^2 - 2bc cos(A) + +when rearranged can be: + +cos(A) = (b^2 + c^2 - a^2) / (2bc) // use this one when you only have side lengths + +when using this use cos^-1 + +example in folder p1 |