cos^{2}30° x sin^{2}30° - cos^{2}60° - sin^{2}60° + cos^{2}45° + sin^{2}45°
= cos30°xsin30°cos30° x sin30°cos30°xsin30°^2 - cos^260°60°60° - sin^260°60°60° + cos^245°45°45° + sin^245°45°45°
= 0.50.50.5^2 - 0 - 1 + 0.70710.70710.7071^2 + 0.70710.70710.7071^2
= 0.25 - 1 + 0.5 + 0.5
= 0.25
sin30° + cos60°
= sin30°30°30° + cos60°60°60°
= 0.5 + 0.5√3
≈ 0.5 + 0.5 * 1.732
= 0.5 + 0.866
≈ 1.366
cos^{2}30° x sin^{2}30° - cos^{2}60° - sin^{2}60° + cos^{2}45° + sin^{2}45°
= cos30°xsin30°cos30° x sin30°cos30°xsin30°^2 - cos^260°60°60° - sin^260°60°60° + cos^245°45°45° + sin^245°45°45°
= 0.50.50.5^2 - 0 - 1 + 0.70710.70710.7071^2 + 0.70710.70710.7071^2
= 0.25 - 1 + 0.5 + 0.5
= 0.25
sin30° + cos60°
= sin30°30°30° + cos60°60°60°
= 0.5 + 0.5√3
≈ 0.5 + 0.5 * 1.732
= 0.5 + 0.866
≈ 1.366