Problem

Problem

Given that P+Q+R=0\mathbf{P} + \mathbf{Q} + \mathbf{R} = 0 . Two out of the three vectors are equal in magnitude. The magnitude of the third vector is 2\sqrt{2} times that of the other two. Which of the following can be the angles between these vectors? a. 90∘,135∘,135∘90^\circ, 135^\circ, 135^\circ b. 45∘,45∘,90∘45^\circ, 45^\circ, 90^\circ c. 30∘,60∘,90∘30^\circ, 60^\circ, 90^\circ d. 45∘,90∘,135∘45^\circ, 90^\circ, 135^\circ

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