$\displaystyle \frac{(\sqrt{5}tan \theta)^2*\sqrt{5}sec^2 \theta}{\sqrt{5 +5tan^2\theta}}$ is supposed to equal $\displaystyle 5tan^2\theta$ it's the part in the middle that's screwing me
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did you post the numerator correctly? here's what can be done with the denominator ... $\displaystyle \sqrt{5 + 5\tan^2{\theta}} $ $\displaystyle \sqrt{5(1 + \tan^2{\theta})} $ $\displaystyle \sqrt{5\sec^2{\theta}}$
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