If the Scalar Product of Two Vectors

question 48

Multiple Choice

If the scalar product of two vectors,
And
,is equal to −3.5,if
,and the angle between the two vectors when they are drawn starting from the same point is equal to 130°,what is the magnitude of
?

• A)2.1
• B)2.5
• C)2.3
• D)2.7
• E)3.1

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