Question

4 sin pi/12 cos pi/12

Answer 1

$4Sinfrac{pi }{12} Cosfrac{pi }{12}=2*(2Sinfrac{pi }{12} Cosfrac{pi }{12})=2*Sin(2*frac{pi }{12})=2Sinfrac{pi }{6}=2*frac{1}{2}=1$

Answer 2

Благодарю

Answer 3

$4 sin( frac{pi}{12} ) cos( frac{pi}{12} ) = 2 sin( frac{pi}{6} ) = 2 times frac{1}{2} = 1$