Find the resultant of three vectors $\overrightarrow {OA} ,\,\overrightarrow {OB} $ and $\overrightarrow {OC} $ shown in the following figure. Radius of the circle is $R$.

6-6

  • A

    $2R$

  • B

    $R(1 + \sqrt 2 )$

  • C

    $R\sqrt 2 $

  • D

    $R(\sqrt 2 - 1)$

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