Question

Qual a tangente do arco de -810° ? *
Opção 2
√3/3
√3
- √3/3
Não existe

Answer 1

$\boxed{\begin{array}{l}\rm-810^\circ=-2\cdot360^\circ-90^\circ\\\rm 360^\circ-90^\circ=270^\circ\\\rm tg(-810^\circ)=tg(270^\circ)=n\tilde ao~existe.\\\boxed{\boxed{\boxed{\boxed{\rm\dagger~\red{\maltese}~\blue{alternativa~d}}}}}\end{array}}$