Determine o conjunto solução de cada uma das inequacoes a seguir, sabendo que x>0 e x<2pi
a)cosx < -1/2
b)tg x > -1
c)sen < 1/2
a)cosx < -1/2
b)tg x > -1
c)sen < 1/2
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Boa tardea) cos(x) < -1(2
2π/3 < x < 4π/3
b) tg(x) > -1
-π/4 < x < π/2 3π/2 < x < π -π < x < - π/2
c) sen(x) < 1/2
-7π/6 < x < π/6