Find the angle between the vectors ( vec{a}= hat{i}- hat{j}+2 hat{k} – McqOptions

MCQOPTIONS

1.	Find the angle between the vectors ( vec{a}= hat{i}- hat{j}+2 hat{k} ,and , vec{b}=3 hat{i}+2 hat{j}+4 hat{k} ).
A.	(cos^{-1} u2061 sqrt{ frac{58}{3}} )
B.	(cos^{-1} u2061 frac{ sqrt{58}}{3} )
C.	(cos^{-1} frac{ u206158}{3 sqrt{3}} )
D.	(cos^{-1} u2061 frac{ sqrt{58}}{3 sqrt{3}} )
Answer» E.

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