1.

Find the principal solution of the equation `tanx=-1/(sqrt(3))`.

Answer» `0 <= x <= 2 pi`
`tan x = - tan(pi/6)`
`= tan(pi - pi/6)`
`= tan((5pi)/6)`
also, `tan x = tan(pi + (5pi)/6)`
`tan x = tan((11 pi)/6)`
answer


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