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32m
comment Integration of $\displaystyle \frac{e^x-1}{e^x+1}$ w.r.t. $x$
Related : math.stackexchange.com/questions/770114/…
39m
answered Integration of $\displaystyle \frac{e^x-1}{e^x+1}$ w.r.t. $x$
42m
answered Finding remainder
23h
revised Find a Polynomial in $x-\frac1x$
added 121 characters in body
23h
comment Prove that $\tan5 \theta = \frac {5\tan \theta -10 \tan ^3 \theta +\tan ^5 \theta} {1-10\tan ^2 \theta +5\tan ^4 \theta}$
@Malcom, See math.stackexchange.com/questions/346368/…
23h
answered How do u prove this?
1d
answered Find a Polynomial in $x-\frac1x$
1d
comment Show that there is a number on the form $11 \dots 000 \dots 0$ divisible by 2014
Sorry for the typo
1d
comment Show that there is a number on the form $11 \dots 000 \dots 0$ divisible by 2014
Carmichael function $$\lambda(19,53)=306$$
2d
comment Epsilon-Delta Limit for Trigonometric Function
Use mathworld.wolfram.com/ProsthaphaeresisFormulas.html
2d
comment $(w^2+x^2).(y^2+z^2)$ is always divisible by which of the max no. Where w;x;y;z are positive odd integers?
@Jack, Focus more, you should get $$4(a^2+b^2+a+b)+2$$ which is divisible by $2$ not by $4$
2d
comment $(w^2+x^2).(y^2+z^2)$ is always divisible by which of the max no. Where w;x;y;z are positive odd integers?
@Jack, Put $w=2a+1, x=2b+1$
2d
comment $(w^2+x^2).(y^2+z^2)$ is always divisible by which of the max no. Where w;x;y;z are positive odd integers?
@Jack, "positive odd integers" and $$(2a+1)^2=8\dfrac{a(a+1)}2+1\equiv1\pmod8$$
2d
answered $(w^2+x^2).(y^2+z^2)$ is always divisible by which of the max no. Where w;x;y;z are positive odd integers?
2d
comment Integral $\int{ \frac{1}{\sqrt {1 - e^{2x}} } dx}$
@GudsonChou, As the methods are different. Putting multiple independent answers in one often reduces legibility
2d
comment Integral $\int{ \frac{1}{\sqrt {1 - e^{2x}} } dx}$
Another way is to set $e^x$ or $e^{2x}=u$
2d
answered Integral $\int{ \frac{1}{\sqrt {1 - e^{2x}} } dx}$
2d
answered Integral $\int{ \frac{1}{\sqrt {1 - e^{2x}} } dx}$
2d
comment Finding common tangents
See math.stackexchange.com/questions/211538/…
2d
comment Find the condition on $a$ and $b$ so that the two tangents drawn to the parabola $y^2=4ax$ from a point are normals to the parabola $x^2=4by$
See maths4iit-jee.blogspot.in/2010/09/…