Question

DETERMINE O VALOR DE c NO TRIÂNGULO OBTUSÂNGULO ABAIXO:
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Answer 1

Pela lei dos senos:

$\mathtt{\dfrac{c}{sen(30^{\circ})}=\dfrac{10}{sen(120^{\circ})}}$

$\mathtt{c.sen(120^{\circ})=10sen(30^{\circ})}$

$\mathtt{c. \dfrac{ \sqrt{3} }{ \cancel2} = 10. \dfrac{1}{ \cancel2} }$

$\mathtt{c = \dfrac{10}{ \sqrt{3} } = \dfrac{10 \sqrt{3} }{3} }$