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If α, β ,γ ,δ be four angles of a cyclic quadrilateral taken in clockwise direction then the value of (2 + Σ cos α cos β) will be

(a)  sin2 α + sinβ

(b)  sin2 γ + sinδ

(c)  sin2 α + sinδ

(d)  sin2 β + sinγ

1 Answer

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Best answer

Correct option (A)(C)

See Fig. α + γ = π and β + γ = π,

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