Trig problem

**ldx2** · December 14th 2009, 10:32 AM

Can someone solve this problem ? I'm stuck ...

$tan^{2}36\times tan^{2}72=5$

**bigwave** · December 14th 2009, 10:49 AM

$<br /> tan^{2}36\times tan^{2}72=5<br />$

ok cannot factor since it is x not +

**ldx2** · December 14th 2009, 11:09 AM

I dont think you can do that... how about :
$\left ( tan36\times tan72 \right )^{2}$
$\left ( \frac{sin36\times sin72}{cos36\times cos72} \right )^{2}$

what about now ?

**ldx2** · December 14th 2009, 11:34 AM

I'm sorry for double posting but i can't return your PM.
Isn't it the same as :
$\left ( xy \right )^{2}=x^{2}y^{2}$

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