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

If O be the origin and `A(x_(1), y_(1)), B(x_(2), y_(2))` are two points, then what is `(OA) (OB) cos angle AOB` ?

A

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

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:

B

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