Question

Helpp
(Show ur work please)
This is law of cosine

Answer 1

13.3

Explanation:

`a^2 = b^2 + c^2 - 2bc \cos A`

`a^2 = 8^2 + 18^2 - 2(8)(18) \cos 43^\circ`

`a^2 = 64 + 324 - 288(0.73135)`

`a^2 = 388 - 210.6299`

`a^2 = 177.370`

`a = √(177.370)`

`a = 13.318`

Answer: 13.3