Three particce P,Q and R are moving along the vectors `vecA = hati + hatj , vecB = hatj + hatk` and `vecC =- hati + hatj` 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`vecA and vecB`. Similarly particle Q is moving normal to the plane which contains vector `vecA and vecC`. Theangle between the direction of motion of P and Q is `cos^(-1)(1/(sqrt(x)))` .Then the value of x is ____.