If O is the origin and P-x-1-y-1-Q-x-2-y-2- are two points OPtimes OQ sinangle POQ-x-1x-2-y-1y-2x-1y-2-x-2y-1x-1y-2-x-2y-1None of these

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If $O$ is the origin and $P (x_{1}, y_{1}), Q (x_{2}, y_{2})$ are two points $O P \times O Q sin ∠ P O Q =$
$x_{1} x_{2} + y_{1} y_{2}$
$x_{1} y_{2} + x_{2} y_{1}$
$x_{1} y_{2} - x_{2} y_{1}$
None of these

x_{1} y_{2} + x_{2} y_{1}

x_{1} y_{2} - x_{2} y_{1}

x_{1} x_{2} + y_{1} y_{2}

None of these

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If O is the origin and P(x1,y1),Q(x2,y2) are two points OP×OQsin∠POQ=x1x2+y1y2x1y2+x2y1x1y2−x2y1None of these

If $O$ is the origin and $P (x_{1}, y_{1}), Q (x_{2}, y_{2})$ are two points $O P \times O Q sin ∠ P O Q =$
$x_{1} x_{2} + y_{1} y_{2}$
$x_{1} y_{2} + x_{2} y_{1}$
$x_{1} y_{2} - x_{2} y_{1}$
None of these