I have a straight-forward question. Could anybody please explain me why...(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\theta = \tan ^{-1} \left( \frac{x}{2} \right) \Rightarrow -\frac{1}{4\sin \theta} = -\frac{\sqrt{x^2+4}}{4x} [/tex]

Thanks

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# Trigonometry - quick question

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