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If O is the origin and A(x(1),y(1)),B(x(...

If O is the origin and `A(x_(1),y_(1)),B(x_(2), y_(2))` are two points then `OA*OB*sin angleAOB=`

A

`x_(1)y_(2) +x_(2)y_(1)`

B

`x_(1)x_(2)+y_(1)y_(2)`

C

`x_(1)y_(2)-x_(2)y`

D

`x_(1)x_(2)y_(1)y_(2)`

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