[tex]\Large\boxed{\begin{array}{l}\underline{\rm Lei~dos~senos}\\\\\underline{\tt Observe~a~2^a~figura~anexada.}\\\huge\boxed{\boxed{\boxed{\boxed{\sf\dfrac{\overline{BC}}{sen(\alpha)}=\dfrac{\overline{AB}}{sen(\theta)}=\dfrac{\overline{AC}}{sen(\beta)}}}}}\end{array}}[/tex]
[tex]\Large\boxed{\begin{array}{l}\underline{\rm Observe~a~1^a~figura~que~eu~anexei}\\\sf\dfrac{x}{sen(77^\circ)}=\dfrac{90}{sen(35^\circ)}\\\\\sf x\cdot sen(35^\circ)=90\cdot sen(77^\circ)\\\sf x\cdot0,57=90\cdot0,97\\\sf0,57x=87,3\\\sf x=\dfrac{87,3}{0,57}\\\\\sf x=153,15~m\end{array}}[/tex]
