How does one integrate $\int e^{-x^2}\,dx$? I read somewhere to use polar coordinates.
How is this done? What is the easiest way?
How to find $\lim_{h\rightarrow 0}\frac{\sin(ha)}{h}$ without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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