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1)    solve the equation on the interval, [0,2pi) .6 tan^2 x -17 tanx +7 =02)  solve the equation on the interval, [0,2pi)sinx = -2/33) 2 tan^2x -2 =04) olve the equation on the interval, [0,2pi)   (cot u +1)(csc u -1) = 0   u   = ?

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