Thursday, 15 January 2015

calculus - How to convert $r = 2scos (theta+t)$ into Cartesian coordinates?

How would I convert $r = 2s\cos (\theta+t)$ into Cartesian coordinates? I believe $r$ currently is in polar coordinates. However, polar coordinates are in form $(r,\theta)$ and the equation given is not in that form. How would I solve this?

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real analysis - How to find $lim_{hrightarrow 0}frac{sin(ha)}{h}$

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}...