Question Number 149045 by mathdanisur last updated on 02/Aug/21

∣a^(→) ∣ = ∣b^(→) ∣ = 4 and cos𝛂 = 60° find a^(→) ∙ b^(→) = ?

Answered by puissant last updated on 02/Aug/21

a^→ .b^→ =∣a^→ ∣×∣b^→ ∣×cosα α=mes(a^→ ;b^→ ) ⇒ a^→ .b^→ =4×4×cos60 = 8...

Commented bymathdanisur last updated on 02/Aug/21

Thank You Ser