Question

Градус между вектором a(-4;3) и в(0:1)

Answer 1

$cos alpha = frac{(vec{a},vec{b})}{|vec{a}|*|vec{b}|} = frac{-4*0+3*1}{ sqrt{(-4)^2+3^2} * sqrt{0^2+1^2} } = frac{3}{5} =0.6 \ \ alpha =arccos0.6 \ \ OTBET: arccos0.6$