120 sin п/24 cos п/24 (cos^2п/24 - sin^2п/24)

Question

120 sin п/24 cos п/24 (cos^2п/24 - sin^2п/24)

Answer 1

60*2* Sin п/24 Cos п/24 (Cos²п/24 - Sin²п/24)=
=60*Sin π/12 * Сosπ/12 = 30Sinπ/6 = 30*1/2 = 15