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 Mar 22 revised How do I approach solving this indeterminate limit? $\lim_\limits{h\to 0}\frac{1}{h}\ln\left(\frac{2+h}{2}\right)$ added 355 characters in body Mar 22 answered How do I approach solving this indeterminate limit? $\lim_\limits{h\to 0}\frac{1}{h}\ln\left(\frac{2+h}{2}\right)$ Mar 9 answered Clarification on random variable probelm Mar 8 awarded Popular Question Feb 17 answered How any formula which gives us $\cos A/2$ in terms of k should give us also the cosine of $(2n \pi ± A) /2$? Jan 25 answered What is the argument of $0$? Jan 13 awarded Nice Question Dec 17 revised Find $\int \frac{x^3}{x^2-1} \:\mathrm{d}x$ added 11 characters in body; edited title Dec 16 revised Is there any integral for sin(x)/x added 11 characters in body Dec 15 comment How to calculate the cumulative distribution function of discrete distribution? For discrete distributions we have the cumulative mass function, rather than the cumulative density function, and it is defined as the sum of the probability mass function of the distribution for all $x < x_0$. Dec 14 reviewed Approve Relation between eigenvalues of $A^k$ and eigenvalues of $A$ Dec 8 answered Power series and differentiation Nov 30 revised $\iiint_W\sqrt{x^2+z^2}\,\mathrm{d}V$ Where $W$ is the solid delimited by $y=4$ and $y=\sqrt{x^2+z^2}$ added 38 characters in body; edited title Nov 30 revised Continuity of the limit of ${f_n}(x) = \cos(2^n\pi x)$. edited title Nov 27 awarded Popular Question Nov 10 awarded Notable Question Nov 4 revised Find norm of operator $L(x,y)=(x+3y,y-x)$ edited body Nov 3 revised Expectation of a continuous random variable with probability one at a given point. added 18 characters in body Oct 30 answered Numerical Identities Oct 30 comment Given max force due to friction and change in mass, calculating angle of inclination. Paradox? Surely what you have found here is the angle at which the object will start to slip due to it's own mass? In which case it makes perfect logical sense for it to be independent of it's mass, whilst increased mass will cause greater frictional force, it will also result in greater gravitational force directed down the slope. These two factors should cancel, giving us a quantity independent of $m$.