Question

Resolver usando lei dos cossenos

Answer 1

a)

x² = b² + c² - 2.b.c . cos x

x² = 6² + (3√3)² - 2.6.3√3 . √3/2

x² = 36 + 27 - 54

x = √9

x = 3.

b)

x² = b² + c² - 2.b.c . cos x

x² = 5² + 8² - 2.5.8. 1/2

x² = 25 + 64 - 40

x = √49

x = 7.

Att, Felipemlvr.