Question

Find if a = 34, b = 28 and c = 15.
Law of cosines

Answer 1

so which angle to you need to find...?

Answer 2

Oh sorry, measure of angle A

Answer 3

so the law of cosines for angle A is

\[\cos(A) = \frac{b^2 + c^2 - a^2}{2bc}\]

that will give a decimal value less than 1

then to find A its

\[A = \cos^{-1}(Answer)\]

hope it helps

Answer 4

It did, thanks!