trig equality - stick

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February 28th 2009, 02:02 PM
TYTY

trig equality - stick

$\frac{(\sqrt{5}tan \theta)^2*\sqrt{5}sec^2 \theta}{\sqrt{5 +5tan^2\theta}}$

is supposed to equal $5tan^2\theta$

it's the part in the middle that's screwing me :o
February 28th 2009, 02:52 PM
skeeter

did you post the numerator correctly?

here's what can be done with the denominator ...

$\sqrt{5 + 5\tan^2{\theta}}<br />$

$\sqrt{5(1 + \tan^2{\theta})}<br />$

$\sqrt{5\sec^2{\theta}}$

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