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Observe the following statements : Statement-I : The angle between the line x=y=z and the plane x+y+z=4 is 90^(@). Statement-II : A tetradedron has vertices O(0,0,0),A(1,2,1),B(2,1,3)andC(-1,1,2). Then the angle between the faces OABandABC is cos^(-1)((19)/(35)). |
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Answer» Only I |
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