- #1
paolostinz
- 25
- 1
My online physics course is using cosine law to find the net forces on objects. My question is to do with the equation, at first it shows it as : c^2=a^2+b^2-2ab cosC.
From there, it changes to: c=[a^2+b^2-2ab cosC]^1/2.
How and why does this work? Why isn't a square root involved in the operation?
From there, it changes to: c=[a^2+b^2-2ab cosC]^1/2.
How and why does this work? Why isn't a square root involved in the operation?