Find the resultant of three vectors \( O A, O B \) and \( O C \) sh...

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Find the resultant of three vectors \( O A, O B \) and \( O C \) shown in the following figure. Radius of the circle is
\( \mathrm{P} \) R.
(A) \( 2 R \)
(B) \( R(1+\sqrt{2}) \)
(C) \( \quad R \sqrt{2} \)
(D) \( R(\sqrt{2}-1) \)
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