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[ 7.If 0ltalphaltbetalt(pi)/(2) then [ 1...

[ 7.If `0ltalphaltbetalt(pi)/(2)` then [ 1)` (tan beta)/(tan alpha)lt(alpha)/(beta),` 2) `(tan beta)/(tan alpha)gt(alpha)/(beta)` 3) `(tan alpha)/(tan beta)lt(alpha)/(beta)`, 4) none ]]

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