<a href="http://www.codecogs.com/eqnedit.php?latex=cos^2(45) = \left (\frac{1}{\sqrt{2}} \right )^{2} = \frac{1}{2}" target="_blank"><img src="http://latex.codecogs.com/gif.latex?cos^2(45) = \left (\frac{1}{\sqrt{2}} \right )^{2} = \frac{1}{2}" title="cos^2(45) = \left (\frac{1}{\sqrt{2}} \right...