8cosП/65 cos2П/65 cos4П/65 cos8П/65 cos16П/65 cos32П/65

(8sinπ/65*cosπ/65*cos2π/65*cos4π/65*cos8π/65*cos16π/65*cos32π/65)/(sinπ/65)=(4sin2π/65*cos4π/65*cos8π/65*cos16π/65*cos32π/65)/(sinπ/65)= =(2sin4 π/65*cos4π/65*cos8π/65*cos16π/65*cos32π/65)/(sinπ/65)= =(sin8 π/65*cos8π/65*cos16π/65*cos32π/65)/(sinπ/65)= =(sin16 π/65*cos16π/65*cos32π/65)/(2*sinπ/65)= =(sin32 π/65*cos32π/65)/(4*sinπ/65)=(sin64 π/65)/(8*sinπ/65)= =(sin(π-π/65)/(8*sinπ/65)=(sinπ/65)/(8*sinπ/65)=1/8