Considere {x ∈ R | π < x < 2π} na igualdade abaixo:
"cossec(x) = −2"
É correto afirmar sobre x:
*
10 pontos
A sen(x) + cos(x) = 1
B x = π/4 rad ou x = 3π/4 rad
C x = π/2 rad
D sen(x) = 0
E x = 7π/6 rad ou x = 11π/6 rad
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