Question

What is the formula for solving a triangle with the law of cosines if you have all the side lengths but need to find the angles?

Answer 1

c^2 - a^2 - b^2
-------------- = cosC
2ab

Answer 2

its the law of cosines solved for cosC

Answer 3

to get the angle youll need to take the consine inverse tho... and keep in mind that cos^-1 spits an angle out in the range of 0 to pi...so adjust as needed

Answer 4

hah... i see a typo

Answer 5

/-2ab...

| c^2 - a^2 - b^2 |
cos^-1 |--------------- | = C ; adjusted of course
| -2ab |