Comments on: Intuition For The Law Of Cosines

By: denialp

denialp — Wed, 31 Jan 2018 12:28:01 +0000

i understood it until you switched from interactions(shown with a square)to triangels .How?Yes you square them but i cannot see how this squaring is influenced by/ or how it interacts with/ the other side of the triangle.Thats why multiplying ab and ba doesnt make sense either .Where is my mistake? cheers

By: Caleb

Caleb — Fri, 24 Mar 2017 14:06:41 +0000

Maybe you could try to make a visualization of haversine and the great circle formula used for calculating two points between two sets of coordinates.

By: joe

joe — Sun, 08 Jan 2017 18:23:33 +0000

For triangle /w sides of length a,b,c respectively:
c^2=a^2+b^2-2abcos(a,b),
where cos(a,b) is the cosine of the angle between sides a& b.

By: Sandy

Sandy — Wed, 16 Nov 2016 20:37:31 +0000

As you work through the explanation at one point theta is defined as the external look at the “misalignment” and at another it is the internal angle. This can be confusing to a new student. Perhaps modifying the angle bnames will help the confused student internalize this explanation more easily.