Solve $$$\cos{\left(2 x \right)} = 0$$$ for $$$x$$$
The calculator will try to solve the equation $$$\cos{\left(2 x \right)} = 0$$$ for $$$x$$$ (find the real and complex roots).
Your Input
Solve the equation $$$\cos{\left(2 x \right)} = 0$$$ for $$$x$$$.
Answer
Real roots
$$$x\in\left\{\pi \left(n - \frac{1}{4}\right)\; \middle|\; n \in \mathbb{Z}\right\}\approx \left\{3.141592653589793 n - 0.785398163397448\; \middle|\; n \in \mathbb{Z}\right\}$$$
$$$x\in\left\{\pi \left(n + \frac{1}{4}\right)\; \middle|\; n \in \mathbb{Z}\right\}\approx \left\{3.141592653589793 n + 0.785398163397448\; \middle|\; n \in \mathbb{Z}\right\}$$$
Complex roots
It seems that there are no complex roots.