Given:
[tex]4\cos x=3[/tex]Solve the equation,
[tex]\begin{gathered} 4\cos x=3 \\ \cos x=\frac{3}{4} \\ x=\cos ^{-1}(\frac{3}{4}) \\ x=\cos ^{-1}(\frac{3}{4})+2\pi n,\: x=2\pi-\cos ^{-1}(\frac{3}{4})+2\pi n \\ x=0.7227+2\pi n,x=2\pi-0.7227+2\pi n \end{gathered}[/tex]Answer:
[tex]x=0.7227+2\pi n,x=2\pi-0.7227+2\pi n[/tex]