JEE Math Practice Question
An angle between the plane, x + y + z = 5 and the line of intersection of the planes, 3x + 4y + z $$-$$ 1 = 0 and 5x + 8y + 2z + 14 =0, is :
- A.$${\sin ^{ - 1}}\left( {\sqrt {{3/{17}}} } \right)$$
- B.$${\cos ^{ - 1}}\left( {\sqrt {{3/{17}}} } \right)$$
- C.$${\cos ^{ - 1}}\left( {{3/{17}}} \right)$$
- D.$${\sin ^{ - 1}}\left( {{3/{17}}} \right)$$
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