Homework Statement
I tried to solve this limit, but failed in the process 'cause the answer's 1 but I get 0. I'd just like for you to check out my steps and tell me what I've done wrong, not post a different solution. Thanks in advance.
\mathop {\lim }\limits_{x \to 0} \frac{{2\sin \left(...
Thanks for your responses anirudh215 and CompuChip, but I really don't know what you mean by "expand". If you could show some steps I might have a clue.
Show that if x>>a...
Homework Statement
I've got the following force generated by an electric field
{F_x} = - KQq\frac{1}{{x\sqrt {{x^2} + {a^2}} }}
{F_y} = \frac{{KQq}}{a}\left( {\frac{1}{x} - \frac{1}{{\sqrt {{x^2} + {a^2}} }}} \right)
Homework Equations
I need to show that...