If - are in A-P- then sin-sin-cos-cos- is equal to

Sinα sinγcosγ cosα =sinα sinγ (cosα cosγ) =2cos(α+γ2)sin(α γ2)2sin(α+γ2)sin(α γ2) = (α+γ2) =β (∵ 2β=α+γ ) ...

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nth Term of A.P

If α,β,γ are ...

Question

If $α, β, γ$ are in A.P., then $\frac{sin α - sin γ}{cos γ - cos α}$ is equal to

cot β

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- tan β

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- cot β

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tan β

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α, β, γ

\frac{sin α - sin γ}{cos γ - cos α}

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cot β = \frac{sin α - sin γ}{cos γ - c o s α} .

c o s α + c o s β + c o s γ = s i n α + s i n β + s i n γ = 0

c o s (β + γ) + c o s (γ + α) + c o s (α + β) = 0

s i n (β + γ) s i n (γ + α) + s i n (α + β) = 0

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c o t β = \frac{sin α - sin γ}{cos γ - cos α}

cos α + cos β + cos γ = 0 = sin α + sin β + sin γ = 0

cos (2 α - β - γ) + cos (2 β - γ - α) + cos (2 γ - α - β) =

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