Find a ·
b. |a| = 4, |b| = 7, the angle between a and b is 2π/3
1 answer:
Answer:
-14
Step-by-step explanation:
a·b = |a|×|b|×cos(angle between them)
= 4×7×(-1/2)
= -14
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Hope this helps and good luck!:D
