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

(I'm doing each individual question)​

Use the law of cosines to find each missing side Round to the nearest tenthIm doing each individual question class=

Respuesta :

mathstudent55

Answer:

x = 9.3

Step-by-step explanation:

The Law of Cosines

[tex] c^2 = a^2 + b^2 - 2ab \cos C [/tex]

[tex] x^2 = 15^2 + 13^2 - 2(15)(13) \cos 38^\circ [/tex]

[tex] x^2 = 225 + 169 - 2(15)(13) \cos 38^\circ [/tex]

[tex] x^2 = 394 - 390(0.7880) [/tex]

[tex] x^2 = 86.6758 [/tex]

[tex] x = \sqrt{86.6758} [/tex]

[tex] x = 9.3 [/tex]

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