2 cos 45° + 4 cos 60°

Using the values of cos 45° = √2 / 2 and cos 60° = 1 / 2:

2(√2 / 2) + 4(1 / 2)
= √2 + 2
≈ 2.41

Therefore, 2 cos 45° + 4 cos 60° ≈ 2.41.