Вычислите: (cos^2 30° × sin^2 30°- cos^2 60-sin^2 60°+sin^245°+cos^2 45°.)

cos^2(30°)×sin^2 (30°)-cos^2(60°)-sin^2 (60°)+sin^2 (45°)+cos^2 (45°)=(3/16)-(1/4)-(3/4)+(2/4)+(2/4)=(3/16)-(4/4)+(4/4)=3/16