Tolong bantuannya kk

Tolong bantuannya kk

a = 4

< A = 120°

< B = 30°

Panjang sisi c = ...?

$frac{a}{ sin( alpha ) } = frac{b}{ sin( beta ) } = frac{c}{ sin(c) }$

$frac{4}{ sin(120) } = frac{c}{ sin(30) } \ frac{4}{ frac{1}{2} sqrt{3} } = frac{c}{ frac{1}{2} } \ frac{4}{ sqrt{3} } = c$

Rasionalkan 4/√3

$frac{4}{ sqrt{3} } . frac{ sqrt{3} }{ sqrt{3} } \ frac{4 sqrt{3} }{3}$