Question

помогите решить,пожалуйста! 

$frac{10cosfrac{pi}{3}sinfrac{pi}{4}}{sqrt{6}}$

Answer 1

$frac{10cosfrac{pi}{3}*frac{sqrt{2}}{2}}{sqrt{6}}= frac{10*frac{1}{2}*frac{sqrt{2}}{2}}{sqrt{6}} =frac{5sqrt{2}}{2sqrt{2}sqrt{3}}=frac{5}{2sqrt{3}} =frac{5sqrt{3}}{6}$