Trigonometry Examples

$\frac{1}{2} \cdot (\cos (2 b + 2 b)) + \cos (2 b - 2 b)$

Step 1

Factor $\frac{1}{2}$ out of each term.

$\frac{1}{2} (\cos (2 b + 2 b) + 2)$

Step 2

Add $2 b$ and $2 b$ .

$\frac{1}{2} \cdot (\cos (4 b) + 2)$