Final answer to the problem
$x=\frac{1}{3}\pi+2\pi n,\:x=\frac{5}{3}\pi+2\pi n,\:x=\frac{2}{3}\pi+2\pi n,\:x=\frac{4}{3}\pi+2\pi n\:,\:\:n\in\Z$
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1
We need to isolate the dependent variable $x$, we can do that by simultaneously subtracting $-1$ from both sides of the equation
$4\cos\left(x\right)^2=-1\cdot -1$
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$4\cos\left(x\right)^2=-1\cdot -1$
Learn how to solve trigonometric equations problems step by step online. Solve the trigonometric equation 4cos(x)^2-1=0. We need to isolate the dependent variable x, we can do that by simultaneously subtracting -1 from both sides of the equation. Multiply -1 times -1. Divide both sides of the equation by 4. Divide 1 by 4.
Final answer to the problem
$x=\frac{1}{3}\pi+2\pi n,\:x=\frac{5}{3}\pi+2\pi n,\:x=\frac{2}{3}\pi+2\pi n,\:x=\frac{4}{3}\pi+2\pi n\:,\:\:n\in\Z$