Find the resultant of the three vectors \( \overrightarrow{\mathrm{OA}}, \overrightarrow{\mathrm...

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Find the resultant of the three vectors \( \overrightarrow{\mathrm{OA}}, \overrightarrow{\mathrm{OB}} \) and \( \overrightarrow{\mathrm{OC}} \) each of magnitude \( r \) as shown in figure?
\( \mathrm{P} \)
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