If there exist three values of αi , −π2≤αi≤π, such that 3∑ – InterviewSolution

1.	If there exist three values of αi , −π2≤αi≤π, such that 3∑i=1sinαi=3∑i=1cosαi=0, then which of the following is/are correct?
Answer» If there exist three values of $α_{i},$ $- \frac{π}{2} \leq α_{i} \leq π$ , such that $3 \sum i = 1 sin α_{i} = 3 \sum i = 1 cos α_{i} = 0,$ then which of the following is/are correct?

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