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0 votes
1.9k views
in Co-ordinate geometry by (46.6k points)

If O is the origin and A and B are, respectively, (a1, b1) and (a2, b2), then OA⋅OB sin(AOB) is equal to

(A)  a1a2 + b1b2 

(B)  a1b2 + a2b1 

(C)  a1b2 − a2b1 

(D)  a1a2 − b1b2

1 Answer

+1 vote
by (38.6k points)
selected by
 
Best answer

Correct option(C)  a1b2 − a2b1 

See Fig.

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