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sin(x/4)<2/sqrt(3) inequation

A inequation with variable

The solution

You have entered [src]
   /x\     2  
sin|-| < -----
   \4/     ___
         \/ 3 
$$\sin{\left(\frac{x}{4} \right)} < \frac{2}{\sqrt{3}}$$
sin(x/4) < 2/sqrt(3)
Detail solution
Given the inequality:
$$\sin{\left(\frac{x}{4} \right)} < \frac{2}{\sqrt{3}}$$
To solve this inequality, we must first solve the corresponding equation:
$$\sin{\left(\frac{x}{4} \right)} = \frac{2}{\sqrt{3}}$$
Solve:
Given the equation
$$\sin{\left(\frac{x}{4} \right)} = \frac{2}{\sqrt{3}}$$
- this is the simplest trigonometric equation
As right part of the equation
modulo =
True

but sin
can no be more than 1 or less than -1
so the solution of the equation d'not exist.
$$x_{1} = 4 \pi - 4 \operatorname{asin}{\left(\frac{2 \sqrt{3}}{3} \right)}$$
$$x_{2} = 4 \operatorname{asin}{\left(\frac{2 \sqrt{3}}{3} \right)}$$
Exclude the complex solutions:
This equation has no roots,
this inequality is executed for any x value or has no solutions
check it
subtitute random point x, for example
x0 = 0

$$\sin{\left(\frac{0}{4} \right)} < \frac{2}{\sqrt{3}}$$
        ___
    2*\/ 3 
0 < -------
       3   
    

so the inequality is always executed
Solving inequality on a graph
Rapid solution [src]
And(-oo < x, x < oo)
$$-\infty < x \wedge x < \infty$$
(-oo < x)∧(x < oo)
Rapid solution 2 [src]
(-oo, oo)
$$x\ in\ \left(-\infty, \infty\right)$$
x in Interval(-oo, oo)