Question

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

(I'm doing each individual question)​

Answer 1

Answer:

x = 9.3

Step-by-step explanation:

The Law of Cosines

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

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

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

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

$x^2 = 86.6758$

$x = \sqrt{86.6758}$

$x = 9.3$