Answer:
[tex]x = \frac{1}{16}\\[/tex]
Step-by-step explanation:
[tex]4x = {\cos}^{2}(30°){\tan}^{2}(30°){\tan}^{2}(45°) \\ 4x = (\frac{\sqrt{3}}{2})^{2}(\frac{1}{\sqrt{3}})^{2}(1)^2 \\ 4x = (\frac{3}{4})(\frac{1}{3})(1) \\ 4x = \frac{3}{12} \\ 4x = \frac{1}{4} \\ x = \frac{1}{16}[/tex]