sin(30°) = cos(60°) = 1/2
1/2 * 1/2 = 1/4
sin(45°) = √2/2, sin²(45°) = (√2/2)² = 2/4
1/4 - 2/4 = -1/4
sin(30°) = cos(60°) = 1/2
1/2 * 1/2 = 1/4
sin(45°) = √2/2, sin²(45°) = (√2/2)² = 2/4
1/4 - 2/4 = -1/4