question_answer

If \[|\overrightarrow{A}-\overrightarrow{B}|\,=\,|\overrightarrow{A}|\,=\,|\overrightarrow{B}|,\,\]the angle between \[\overrightarrow{A}\]and \[\overrightarrow{B}\] is

A)                 \[\text{6}0{}^\circ \]      

B)                 \[0{}^\circ \]

C)                 \[\text{12}0{}^\circ \]   

D)                 \[\text{9}0{}^\circ \]