Finite Math Examples

$\cos^{4} (2 a) - \sin^{2} (2 a) = \cos (4 a)$

Step 1

Subtract $\cos (4 a)$ from both sides of the equation.

$\cos^{4} (2 a) - \sin^{2} (2 a) - \cos (4 a) = 0$

Step 2

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.