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If O=(0,0,0), A=(1,2,1), B=(2,1,3), C = ...

If `O=(0,0,0), A=(1,2,1), B=(2,1,3), C = (1,1,2)` and OABC is a tetrahedron. Find the angle between the faces OAB and ABC.

Text Solution

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The correct Answer is:
`cos^(-1)((19)/(35))`
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