Question

Determine O Valor De X: ( Passo A Passo)​

Answer 1

Vamos usar a lei dos cossenos.

x2 = ( √3 ) 2 + ( 3 ) 2 - 2•3•√3 • cos 30

x2 = 3 + 9 - 6√3•√3 / 2

x2 = 3 + 9 - 3√9

x2 = 3 + 9 - 3•3

x2 = 3 + 9 - 9

x2 = 3

x = √3

Answer 2

Lei dos cossenos:

a² = b² + c² — 2bc • Cosalfa

$a^2=(\sqrt{3})^2+3^2-2(\sqrt{3}).3.Cos30°$

$a^2=3+9-6\sqrt{3}.\frac{\sqrt{3}}{2}$

$a^2=12-\frac{6\sqrt{3}.\sqrt{3}}{2}$

$a^2=12-\frac{6.3}{2}$

$a^2=12-\frac{18}{2}$

MMC=2

$a^2=\frac{24-18}{2}=\frac{6}{2}$

$a^2=3$

$\boxed{\begin{array}{Ir}a=\sqrt{3}\end{array}}$

Espero ter ajudado bastante!)