Sr Examen

cos2x+cos3x>0 desigualdades

En la desigualdad la incógnita

Solución

Ha introducido [src]
cos(2*x) + cos(3*x) > 0
$$\cos{\left(2 x \right)} + \cos{\left(3 x \right)} > 0$$
cos(2*x) + cos(3*x) > 0
Solución de la desigualdad en el gráfico
Respuesta rápida 2 [src]
        /         ___________\              /         ___________\                      /         ___________\           /         ___________\              
        |  ___   /       ___ |              |  ___   /       ___ |                      |  ___   /       ___ |           |  ___   /       ___ |              
        |\/ 2 *\/  5 - \/ 5  |              |\/ 2 *\/  5 + \/ 5  |                      |\/ 2 *\/  5 + \/ 5  |           |\/ 2 *\/  5 - \/ 5  |              
[0, atan|--------------------|) U (pi + atan|--------------------|, pi) U (pi, pi - atan|--------------------|) U (- atan|--------------------| + 2*pi, 2*pi]
        |           ___      |              |           ___      |                      |           ___      |           |           ___      |              
        \     1 + \/ 5       /              \     1 - \/ 5       /                      \     1 - \/ 5       /           \     1 + \/ 5       /              
$$x\ in\ \left[0, \operatorname{atan}{\left(\frac{\sqrt{2} \sqrt{5 - \sqrt{5}}}{1 + \sqrt{5}} \right)}\right) \cup \left(\operatorname{atan}{\left(\frac{\sqrt{2} \sqrt{\sqrt{5} + 5}}{1 - \sqrt{5}} \right)} + \pi, \pi\right) \cup \left(\pi, \pi - \operatorname{atan}{\left(\frac{\sqrt{2} \sqrt{\sqrt{5} + 5}}{1 - \sqrt{5}} \right)}\right) \cup \left(- \operatorname{atan}{\left(\frac{\sqrt{2} \sqrt{5 - \sqrt{5}}}{1 + \sqrt{5}} \right)} + 2 \pi, 2 \pi\right]$$
x in Union(Interval.Ropen(0, atan(sqrt(2)*sqrt(5 - sqrt(5))/(1 + sqrt(5)))), Interval.open(pi, pi - atan(sqrt(2)*sqrt(sqrt(5) + 5)/(1 - sqrt(5)))), Interval.open(atan(sqrt(2)*sqrt(sqrt(5) + 5)/(1 - sqrt(5))) + pi, pi), Interval.Lopen(-atan(sqrt(2)*sqrt(5 - sqrt(5))/(1 + sqrt(5))) + 2*pi, 2*pi))
Respuesta rápida [src]
  /   /                /         ___________\\     /                 /         ___________\           \     /                     /         ___________\\     /                 /         ___________\    \\
  |   |                |  ___   /       ___ ||     |                 |  ___   /       ___ |           |     |                     |  ___   /       ___ ||     |                 |  ___   /       ___ |    ||
  |   |                |\/ 2 *\/  5 - \/ 5  ||     |                 |\/ 2 *\/  5 - \/ 5  |           |     |                     |\/ 2 *\/  5 + \/ 5  ||     |                 |\/ 2 *\/  5 + \/ 5  |    ||
Or|And|0 <= x, x < atan|--------------------||, And|x <= 2*pi, - atan|--------------------| + 2*pi < x|, And|pi < x, x < pi - atan|--------------------||, And|x < pi, pi + atan|--------------------| < x||
  |   |                |           ___      ||     |                 |           ___      |           |     |                     |           ___      ||     |                 |           ___      |    ||
  \   \                \     1 + \/ 5       //     \                 \     1 + \/ 5       /           /     \                     \     1 - \/ 5       //     \                 \     1 - \/ 5       /    //
$$\left(0 \leq x \wedge x < \operatorname{atan}{\left(\frac{\sqrt{2} \sqrt{5 - \sqrt{5}}}{1 + \sqrt{5}} \right)}\right) \vee \left(x \leq 2 \pi \wedge - \operatorname{atan}{\left(\frac{\sqrt{2} \sqrt{5 - \sqrt{5}}}{1 + \sqrt{5}} \right)} + 2 \pi < x\right) \vee \left(\pi < x \wedge x < \pi - \operatorname{atan}{\left(\frac{\sqrt{2} \sqrt{\sqrt{5} + 5}}{1 - \sqrt{5}} \right)}\right) \vee \left(x < \pi \wedge \operatorname{atan}{\left(\frac{\sqrt{2} \sqrt{\sqrt{5} + 5}}{1 - \sqrt{5}} \right)} + \pi < x\right)$$
((0 <= x)∧(x < atan(sqrt(2)*sqrt(5 - sqrt(5))/(1 + sqrt(5)))))∨((x < pi)∧(pi + atan(sqrt(2)*sqrt(5 + sqrt(5))/(1 - sqrt(5))) < x))∨((pi < x)∧(x < pi - atan(sqrt(2)*sqrt(5 + sqrt(5))/(1 - sqrt(5)))))∨((x <= 2*pi)∧(-atan(sqrt(2)*sqrt(5 - sqrt(5))/(1 + sqrt(5))) + 2*pi < x))