Question

Use the law of cosines to find each missing side. Round to the nearest tenth.

(I'm doing each individual question)​

Answer 1

x = 9.3

Explanation:

The Law of Cosines

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

`x^2 = 15^2 + 13^2 - 2(15)(13) \cos 38^\circ`

`x^2 = 225 + 169 - 2(15)(13) \cos 38^\circ`

`x^2 = 394 - 390(0.7880)`

`x^2 = 86.6758`

`x = √(86.6758)`

`x = 9.3`