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T_{A} is the time for the path AB.

T_{C} is the time for the path CD.

T_{A}=√(2/g){[((1/sinθ)-(1/cosθ))√(Asinθ)]+(1/cosθ)√(Asinθ+Bcosθ)}

T_{C}=√(2/g){[-((1/sinθ)-(1/cosθ))√(Bcosθ)]+(1/sinθ)√(Asinθ+Bcosθ)}