evelynmelgosa evelynmelgosa

14-06-2021
Mathematics

contestada

help plsss it’s timed i need to passss plsss

help plsss its timed i need to passss plsss class=

Respuesta :

19-06-2021

Answer:

65°

Step-by-step explanation:

To obtain Angle A, we use the cosine rule ;

Cos A = (b² + c² - a²) / 2bc

Cos A = (12² + 14² - 14²) / 2(12)(14)

Cos A = 144 / 336

A = Cos^-1(144/336)

A = 64.62°

A = 65°

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