Question

Jika |a| = 10, |b| = 6 dan <(a+b) = 60° maka |a-b| ?

Answer 1

Verified answer

Mapel : Matematika
Kelas : X SMA
Bab : Vektor

Pembahasan :
|a - b|² = |a|² + |b|² - 2|a| |b| Cos 60°
|a - b|² = 10² + 6² - 2(10)(6) (1/2)
|a - b|² = 100 + 36 - 60
|a - b|² = 76
|a - b| = √76
|a - b| = 2√19