Lf -2 and - - - are in A-P- then the value of - is

The correct option is C 3 α , #10;β , γ are in A.P. #10; 2 β =α +γ #10;=tanα +tanγ/tanαtanγ #10; 2 β =tan (α +γ )(1 #10;tanαtan ...

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lf α+β+γ=π/...

Question

lf $α + β + γ = \frac{π}{2}$ and $cot α, cot β, cot γ$ are in $A . P$ ., then the value of $cot α . cot γ$ is

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