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cos(2*x)-2cos(x)>0 desigualdades

En la desigualdad la incógnita

Solución

Ha introducido [src]
cos(2*x) - 2*cos(x) > 0
$$- 2 \cos{\left(x \right)} + \cos{\left(2 x \right)} > 0$$
-2*cos(x) + cos(2*x) > 0
Solución de la desigualdad en el gráfico
Respuesta rápida 2 [src]
          /  ___ 4 ___\           /  ___ 4 ___\ 
          |\/ 2 *\/ 3 |           |\/ 2 *\/ 3 | 
(pi + atan|-----------|, pi - atan|-----------|)
          |       ___ |           |       ___ | 
          \ 1 - \/ 3  /           \ 1 - \/ 3  / 
$$x\ in\ \left(\operatorname{atan}{\left(\frac{\sqrt{2} \sqrt[4]{3}}{1 - \sqrt{3}} \right)} + \pi, \pi - \operatorname{atan}{\left(\frac{\sqrt{2} \sqrt[4]{3}}{1 - \sqrt{3}} \right)}\right)$$
x in Interval.open(atan(sqrt(2)*3^(1/4)/(1 - sqrt(3))) + pi, pi - atan(sqrt(2)*3^(1/4)/(1 - sqrt(3))))
Respuesta rápida [src]
   /             /  ___ 4 ___\           /  ___ 4 ___\    \
   |             |\/ 2 *\/ 3 |           |\/ 2 *\/ 3 |    |
And|x < pi - atan|-----------|, pi + atan|-----------| < x|
   |             |       ___ |           |       ___ |    |
   \             \ 1 - \/ 3  /           \ 1 - \/ 3  /    /
$$x < \pi - \operatorname{atan}{\left(\frac{\sqrt{2} \sqrt[4]{3}}{1 - \sqrt{3}} \right)} \wedge \operatorname{atan}{\left(\frac{\sqrt{2} \sqrt[4]{3}}{1 - \sqrt{3}} \right)} + \pi < x$$
(pi + atan(sqrt(2)*3^(1/4)/(1 - sqrt(3))) < x)∧(x < pi - atan(sqrt(2)*3^(1/4)/(1 - sqrt(3))))