If points →a,→b,→c and →d are coplanar and (sinα)→a+(2sin2� – InterviewSolution

1.	If points →a,→b,→c and →d are coplanar and (sinα)→a+(2sin2β)→b+(3sin3γ)→c−→d=0, then the least value of sin2α+sin22β+sin23γ is
Answer» If points $\to a, \to b, \to c$ and $\to d$ are coplanar and $(sin α) \to a + (2 sin 2 β) \to b + (3 sin 3 γ) \to c - \to d = 0,$ then the least value of ${sin}^{2} α + {sin}^{2} 2 β + {sin}^{2} 3 γ$ is

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