Homework Statement
\int \frac{cosx dx}{\sqrt{1 + sin^{2}x}}
Homework Equations
Expression: \sqrt{a^{2} + x^{2}}
Substitution: x = a*tan\Theta
Identity: 1 + tan^{2}\Theta = sec^{2}\Theta
The Attempt at a Solution
I have tried using Trig Substitution, but I end up getting an equation much...
In convalent bonds, when the atoms interact to form the bonds, where do the valence electrons, or clouds, exist. Do the simply loop around them in a chaotic figure eight of sorts, or do the electrons spin inbetween them? Is the realitive location of the the val. e-'s even know? And if the...