105,184 reputation
987163
bio website
location Kolkata, India
age
visits member for 2 years, 4 months
seen 19 hours ago

1d
revised How to find the equation of lines passing through the origin and perpendicular to the lines $xy-3y^2+y-2x+10=0$
edited body
1d
revised Proof of $\arcsin x \le 2\arctan x$?
added 448 characters in body
1d
revised Last 3 digits of $7^{12341}$
added 2 characters in body; edited tags
Oct
18
revised Finding the limit of ${x+\sqrt{x^2-4x+1}}$ at negative infinity
added 141 characters in body
Oct
18
revised Find all $(h,k)$ such that $2^h \equiv 1 ~(\text{mod}~ 3^k) $
added 143 characters in body
Oct
18
revised Substation problem with a simple integral
added 17 characters in body
Oct
18
revised Substation problem with a simple integral
added 6 characters in body
Oct
18
revised If $(a + ib)^3 = 8$, prove that $a^2 + b^2 = 4$
added 154 characters in body
Oct
18
revised $\tan \{\frac{1}{2} \sin^{–1} (2x/ 1 + x^2) + \frac{1}{2} \cos^{–1} (1 – y^2/1 + y^2) \}$ is equal to.
added 979 characters in body
Oct
16
revised Find the value of X when X is positive intigers.
added 26 characters in body
Oct
16
revised Find the value of X when X is positive intigers.
added 99 characters in body
Oct
14
revised Show that $2\cos(x)$ is equal to $2\cos(2x)\sec(x)+\sec(x)\tan(x)\sin(2x)$
added 6 characters in body; edited title
Oct
11
revised Solving a definite integral:
added 1 character in body
Oct
11
revised Solving $2\arcsin\frac{x}{2}+\arcsin(x\sqrt{2})=\frac{\pi}{2}$
added 75 characters in body
Oct
11
revised Find the remainder of $(p-2)!$ module $p$, where $p$ is a prime $\geq 3$
deleted 37 characters in body
Oct
11
revised Prove that $\sin(2\arcsin x + \arccos x) = \sqrt{1-x^2}$
deleted 113 characters in body
Oct
10
revised System of two equations with two unknowns - can't get rid of $xy$
added 13 characters in body
Oct
10
revised $\lim_{x \to \infty} (x+2)-\sqrt{x^2+6x-1}$
added 5 characters in body
Oct
9
revised How to approach $\displaystyle\lim_{x\to0} (\cos x)^{\frac{1}{x^2}}$
added 12 characters in body
Oct
8
revised $13$ divides $10^{2p}-10^p+1$ for any prime $p > 3$
added 56 characters in body