Question

3. Вычислите: 2sin15˚۫∙cos15˚.

Answer 1

$sin2a=2sina*cosa$
$2sin15*cos15=sin2 * 15=sin30= \frac{1}{2} =0,5$

Answer 2

2sin15⁰·cos15⁰=sin30⁰=1/2;