Trigonometry Examples

$2 \cos (\frac{π}{3}) \cos (\frac{π}{5}) = \sin (\frac{8 π}{15}) + \sin (\frac{2 π}{15})$

Step 1

The left side $0.80901699$ does not equal to the right side $1.40125853$ , which means that the given statement is false.

False