Question

Laws of cosines!!! find C round to the nearest tenth!!!! someone help​

Answer 1

Yes the correct answer is c

Answer 2

`C = 69.1^\circ`

Explanation:

`c^2 = a^2 + b^2 - 2ab\cos C`

`a = 17 ft; ~b = 8 ft; ~c = 16 ft`

`16^2 = 17^2 + 8^2 - 2(17)(8)\cos C`

`256 = 289 + 64 - 272\cos C`

`-97 = -272 \cos C`

`\cos C = (-97)/(-272)`

`\cos C = 0.3566`

`C = \cos^(-1) 0.3566`

`C = 69.1^\circ`