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1.Suppose that vector a = <3,1,2> and vector b = <-1,3,4>. Then the angle between these...

1.Suppose that vector a = <3,1,2> and vector b = <-1,3,4>. Then the angle between these vectors is

2. Suppose that vector a = <4,6 ,z> and vector b = <2, 3, -2>,

3. Let a = i +j+k  be a vector in . Then the direction angle γ, the angle between a and the z-axis is ....degrees. (Use one decimal place accuracy.

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