Jika |a| = 8, |b| = 4, dan ∠(a,b) = 135° Tentukan |a+b| and |a-b|

Penjelasan dengan langkah-langkah:

45% x a = 135

a = 135 : 45%

= 135 x 100/45

= 300

3/8 x b = 21

b = 21 x 8/3

= 56

a + b = 356

maaf kalo salah