Задача 42850 Задание на картинке...

barca121

2019-12-18 17:11:03

Задание на картинке

sova

2019-12-19 14:18:11

vector{a}*vector{b}=|vector{a}|*|vector{b}|*cos( ∠ vector{a},vector{b})

⇒
cos( ∠ vector{a},vector{b})=6/(2*3)=1

[b]∠ vector{a},vector{b}=0[/b] ⇒

sin( ∠ vector{a},vector{b})=6/(2*3)=0

|vector{a} × vector{b}|=|vector{a}|*|vector{b}|*sin( ∠ vector{a},vector{b})=0