I'm having trouble with two problems:(adsbygoogle = window.adsbygoogle || []).push({});

2tan(x) - 2cot(x) = -3

and

cos(x)^2 + sin(x) = 0

On the 2nd one, I can substitute 1-sin(x)^2 for cos(x)^2 right? I tried that, but it didn't work. And I have no clue what to do on the first one. Little help please?

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# Homework Help: Trigonometric Equations

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