If Vectors $\overrightarrow { \mathrm { A } }$ And $\vec { B }$

question 73

Multiple Choice

If vectors $\overrightarrow { \mathrm { A } }$ and $\vec { B }$ have magnitudes 12 and 15,respectively,and the angle between the two when they are drawn starting from the same point is 110 $\degree$ ,what is the scalar product of these two vectors?

• A)-76
• B)-62
• C)-90
• D)-47
• E)-170

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