Question

Please help I need it ASAP, also needs to be rounded to the nearest 10th

Answer 1

Answer: 161.2

Explanation:

Plug into formula

6.9² = 13²+17.8²-2(17.8)(13) cos C >simplify numbers

-438.23 = -2(17.8)(13) cos C >Divide both sides by -2(17.8)(13)

cos C=.947 > use
`cos^(-1)` C to solve for angle

<C=180-18.75 = 161.2 > neded to subtract from 180 for this

one