Question

Pensando na congruência entre arcos, determine qual seria o seno de um arco de 1350°.​

Answer 1

$\large\boxed{\begin{array}{l}\rm 1350^\circ|\underline{360^\circ}\\\rm\!\!\!\!-\underline{1080^\circ}~~3\\\rm ~\,270^\circ\\\rm 1350^\circ=3\cdot360^\circ+270^\circ\\\rm sen (1350^\circ)=sen(270^\circ)=-1\end{array}}$