Question

4) Calcule o valor de X nos triângulos retângulos.​

Answer 1

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$\tt{a)}~\sf{sen(30^{\circ})=\dfrac{x}{12}}\\\sf{0,50=\dfrac{x}{12}}\\\sf{x=12\cdot0,5}\\\sf{x=6}\\\tt{b)}~\sf{cos(43^{\circ})=\dfrac{x}{9}}\\\sf{0,73=\dfrac{x}{9}}\\\sf{x=9\cdot0,73}\\\sf{x=6,57}\\\tt{c)}~\sf{tg(27^{\circ})=\dfrac{x}{7}}\\\sf{x=7\cdot tg(27^{\circ})}\\\sf{x=7\cdot0,51}\\\sf{x=3,57}$