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[" Whenever it is defined is "],[[" 1) "4," 2) "-2," 3) "0],[" If "tan^(2)alpha tan^(2)beta+tan^(2)beta tan^(2)gamma+tan^(2)gamma tan^(2)alpha+2tan^(2)alpha tan^(2)beta tan^(2)gamma=1," 4) "2],[" 1) "0," 2) "-1," 7"-5cot theta]]

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