Odpowiedź :
w⃗ ∘z⃗ =|w⃗ |⋅|z⃗ |⋅cos(α)
a) w⃗ ∘z⃗ =5*7*cos(360)= 35
a) w⃗ ∘z⃗ =5*7*cos(150)≈ -30,31
a) w⃗ ∘z⃗ =5*7*cos(45)≈ 24,75
a) w⃗ ∘z⃗ =5*7*cos(20)≈ 32,89
w⃗ ∘z⃗ =|w⃗ |⋅|z⃗ |⋅cos(α)
a) w⃗ ∘z⃗ =5*7*cos(360)= 35
a) w⃗ ∘z⃗ =5*7*cos(150)≈ -30,31
a) w⃗ ∘z⃗ =5*7*cos(45)≈ 24,75
a) w⃗ ∘z⃗ =5*7*cos(20)≈ 32,89