1.

In the cartesian plane, O is the origin of the coordinate axes. A person starts at O and walks a distance of 3 units in the NORTH - EAST direction and reaches the point P. From P he walks 4 units distance parallel to NORTH - WEST direction and reaches the point Q. Express the vector bar(OQ) interms of bar(i) and bar(j) (Observe angleXOP=45^(@))

Answer»


ANSWER :`(1)/(SQRT(2))(-BAR(i)+7bar(j))`


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