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Three particles P,Q and R are moving along the vectors →A=^i+^j, →B=^j+^k and →C=−^i+^j respectively. They strike on a point and start to move in different directions. Now particle P is moving normal to the plane which contains vector →A and →B . Similarly, particle Q is moving normal to the plane which contains vector →A and →C . The angle between the direction of motion of P and Q is cos−1(1√x). Then the value of x is |
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Answer» Three particles P,Q and R are moving along the vectors →A=^i+^j, →B=^j+^k and →C=−^i+^j respectively. They strike on a point and start to move in different directions. Now particle P is moving normal to the plane which contains vector →A and →B . Similarly, particle Q is moving normal to the plane which contains vector →A and →C . The angle between the direction of motion of P and Q is cos−1(1√x). Then the value of x is |
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