(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The original problem is this: ab^2*cos(2x)*(cos(x))^2 + ba^2*sin(2x)*(sin(x))^2 = 0

And some of the more "logical" forms I've got to are these:

2[tan(x)]^3-2tan(x) = -b/a

tan(2x)*(tan(x))^2=-b/a

But I can't solve these equations so I'd like to ask for some help here.

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# Trigonometric equation

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