Помогите решить. Во вложении.
1/2sinπ/8cos²π/16-1/2sinπ/8sin²π/16=1/2sinπ/8(cos²π/16-sin²π/16)= =1/2sinπ/8*cosπ/8=1/4sinπ/4=1/2*√2/2=√2/4