You are given two vectors a=(2,3,4) and b=(0,2,1)
Which of the following is/are true?
- a is perpendicular to b.
- The angle between a and b is arccos(2295)
- The vector a+2b is parallel to vector b
- The direction cosines of the vector a+b are arccos(362), arccos(365) ,and arccos(365)
- 21a−31b=(1,613,37)
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