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posted by leanne on Friday, July 30, 2010 at 11:31pm.

solve 1-tan^2x=0 , 0≤x≤2pi

1-tan^2x=0 tan^2 x = 1 tan x = ±1 x = π/4, π - π/4, π + π/4, or 2π - π/4 x π/4, 3π/4, 5π/4, 7π/4

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