Considere {x ∈ R | π < x < 2π} na igualdade abaixo:

"cossec(x) = −2"

É correto afirmar sobre x:

*


A) x = π/6 rad ou x = 5π/6 rad

B) sen(x) = 0

C) x = π/4 rad ou x = 3π/4 rad

D) x = π/2 rad

E) sen(x) + cos(x) = 1




PF ME AJUDEM É URGENTE
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