Parth Kohli
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 Mar6 reviewed Approve Proving $\lim_{x\to 0} \sin x = 0$ and finding solutions to $\frac{1-x}{1-x^2}\leq \frac{1}{x}$ Feb7 revised Probability of $(a+b\omega+c\omega^{2})(a+b\omega^{2}+c\omega)=1$ edited title to more conventional notation (omega). Jan7 awarded Nice Answer Jan4 comment Given $a+b+c$, Can I calculate $a^2+b^2+c^2$? No. Are there any more details given? If $ab + bc + ca$ is given, for example, then you can use the relation $(a+b+c)^2 = a^2 + b^2 + c^2 + 2(ab + bc + ca)$. Dec20 awarded Constituent Dec9 awarded Caucus Nov3 comment Is zero odd or even? That is a valid test too. Odd $-$ odd is always even. So zero is even. Oct22 answered Without actually calculating the value of cubes find the value of $(1)^3+(2)^3+2(4)^3+(-5)^3+(-6)^3$. Also write the identity used Sep30 awarded Explainer Sep28 reviewed Edit Are there any nonzero integers $a$ , $b$ such that $a^2$ = $3b^2$ Sep28 revised Are there any nonzero integers $a$ , $b$ such that $a^2$ = $3b^2$ non-latexed to latex Sep20 answered How do I factor $z^4+2z^3+4z^2+2z+3$? Aug31 comment Find the sum, if exists $\sum\limits_{n=1}^{\infty} \frac{(2n)!}{2^{2n}(n!)^2(n+1)}$ I'd just stick to Shubham's method. Aug31 revised Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$. added 35 characters in body Aug31 revised Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$. added clarity Aug31 revised Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$. edited title Aug31 answered Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$. Aug30 revised Adding $2$ absolute values together: $|x+2| + |x-3| =5.$ deleted 3 characters in body Aug30 answered Adding $2$ absolute values together: $|x+2| + |x-3| =5.$ Aug2 comment What are some good questions for this trick, if $\frac{a}{b}=\frac{c}{d}=\frac{e}{f}=\dots=\alpha$ then $\alpha=\frac{a+c+e+…}{b+d+f+…}$? Do you happen to have a copy of Higher Algebra by Hall and Knight? It contains quite a few of these in the first chapter.