Question 1181867
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<pre>

The given equation  


    {{{2*tan(theta)}}} = - 2


is equivalent to


    {{{tan(theta)}}} = - 1.


It has the general solution


    {{{theta}}} = {{{3pi/4 + k*pi}}},   where k is any integer number  k = 0, +/- 1, +/- 2, . . . 
</pre>

Solved and explained.