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May
24
answered How to convert $\cos4\theta$ into $\cos3\theta$
May
7
awarded  Good Answer
Mar
6
reviewed Approve Proving $\lim_{x\to 0} \sin x = 0$ and finding solutions to $\frac{1-x}{1-x^2}\leq \frac{1}{x}$
Feb
7
revised Probability of $(a+b\omega+c\omega^{2})(a+b\omega^{2}+c\omega)=1$
edited title to more conventional notation (omega).
Jan
7
awarded  Nice Answer
Jan
4
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 $(a+b+c)^2 = a^2 + b^2 + c^2 + 2(ab + bc + ca)$.
Dec
20
awarded  Constituent
Dec
9
awarded  Caucus
Nov
3
comment Is zero odd or even?
That is a valid test too. Odd $-$ odd is always even. So zero is even.
Oct
22
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
Sep
30
awarded  Explainer
Sep
28
reviewed Edit Are there any nonzero integers $a$ , $b$ such that $a^2$ = $3b^2$
Sep
28
revised Are there any nonzero integers $a$ , $b$ such that $a^2$ = $3b^2$
non-latexed to latex
Sep
20
answered How do I factor $z^4+2z^3+4z^2+2z+3$?
Aug
31
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.
Aug
31
revised Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$.
added 35 characters in body
Aug
31
revised Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$.
added clarity
Aug
31
revised Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$.
edited title
Aug
31
answered Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$.
Aug
30
revised Adding $2$ absolute values together: $|x+2| + |x-3| =5.$
deleted 3 characters in body