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1m
comment Calculate period of 3 added trig functions?
@Lightvvind, Why do you think that the order will matter, here? Start with anyone and check
7m
comment Calculate period of 3 added trig functions?
See math.stackexchange.com/questions/897987/… OR math.stackexchange.com/questions/873723/…
3h
comment Integration of $\displaystyle \frac{e^x-1}{e^x+1}$ w.r.t. $x$
Related : math.stackexchange.com/questions/770114/…
1d
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/…
2d
comment Show that there is a number on the form $11 \dots 000 \dots 0$ divisible by 2014
Sorry for the typo
2d
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
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
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/…
2d
comment To determine the existence and the value of $\lim_{x \to 0} \frac {2^x-1} x$
$$2=e^{\ln2}$$ and math.stackexchange.com/questions/152605/…
2d
comment The supremum value of $x^{2}y^{2}(x^{2}+y^{2})$ when $x+y=2n$ for some fixed $n\in \mathbb N $
@EugenCovaci, Agreed with your point, not but sure about the downvote
2d
comment The supremum value of $x^{2}y^{2}(x^{2}+y^{2})$ when $x+y=2n$ for some fixed $n\in \mathbb N $
@EugenCovaci, $$t=xy\le n$$ Yes $t$ can be reduces to $-\infty$
2d
comment Probability that a natural number is a sum of two squares?
See math.hmc.edu/funfacts/ffiles/20008.5.shtml
2d
comment Finding cubed roots of complex number
No. Need to use proper st of values of $n$
2d
comment Finding cubed roots of complex number
$$n\equiv0,1,2\pmod3$$ See math.stackexchange.com/questions/192742/how-to-solve-x3-1