Fundamental data science question — Why |a||b|cos(x)=x1y1+x2y2?

Fundamental data science question — Why |a||b|cos(x)=x1y1+x2y2?

a year ago
Anonymous $pUsIN4hzN9
Last Seen
8 minutes ago
Reputation
0
Spam
0.000
Last Seen
34 minutes ago
Reputation
0
Spam
0.000
Last Seen
36 minutes ago
Reputation
0
Spam
0.000
Last Seen
3 hours ago
Reputation
0
Spam
0.000
Last Seen
2 hours ago
Reputation
0
Spam
0.000
Last Seen
8 minutes ago
Reputation
0
Spam
0.000