mstrubinger19 mstrubinger19

27-01-2018
Mathematics

contestada

Find a ·
b. |a| = 4, |b| = 7, the angle between a and b is 2π/3

Respuesta :

sqdancefan sqdancefan

25-03-2019

Answer:

-14

Step-by-step explanation:

a·b = |a|×|b|×cos(angle between them)

= 4×7×(-1/2)

= -14

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