If a+ b+ c= 0, | a|=3, | b|=5 and | c|=7, then the angle between a and b is: · questionr

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Question 315 of 379EasyMCQ

If

\vec a+\vec b+\vec c=\vec 0

,

|\vec a|=3

,

|\vec b|=5

and

|\vec c|=7

, then the angle between

\vec a

and

\vec b

is:

Solutions · 1

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