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Sabiendo que: sen(x) = (-2)/3 ; 180º< x <270º
Halla las restantes razones trigonométricas sin usar calculadora. Para la resolución
del ejercicio es obligatorio operar con fracciones y radicales y además determina:
a) tg(180º-x)=
b) sin(270º+x) =
c) cos(90º-x)=
Sagot :
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