सदिश bar(a)=alpha bar(i)+2bar(j)+beta ba...

सदिश `bar(a)=alpha bar(i)+2bar(j)+beta bar(k)`, सदिशों `bar(b)=bar(i)+bar(j)` तथा `bar(c)=bar(j)+bar(k)` के तल में स्थित है तथा `bar(b)` और `bar(c)` के बीच के कोण का समद्विभाजन करता है, तो निम्न में से कौनसा `alpha` और `beta` के सम्भावित मान प्रदान करता है ?

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