Sin 30° cos 45°+cos 30°. Sin 45°= By Admin ReiPosted on December 7, 2022 Sin 30° cos 45°+cos 30°. Sin 45°= Sin 30 cos 45+cos 30 sin 45=1/2×1/2√2 + 1/2√3 x 1/2 √2=√2 + √6