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11h
revised reflection of the point $(1,0)$
added 1 character in body
16h
revised Difficult inverse tangent identity
added 369 characters in body
1d
revised Is it possible to have $a^2 + b^2 = c^2 + 1$ for $a$, $b$, $c$ being coprime integers?
added 173 characters in body
2d
revised Solving $7[x]+23\{x\}=191$
added 22 characters in body
2d
revised Simplifying recurrence relation $T_{n+1}=20T_n-48\times 8^n$
edited body
2d
revised Solve $\cos3x=\cos4x$
added 196 characters in body
May
27
revised Basic trigonometry intuition
added 389 characters in body
May
25
revised Solving a Radical Equation $5(\sqrt{1-x} + \sqrt{1+x}) = 6x + 8\sqrt{1-x^2}$ (squaring doesn't help)
added 430 characters in body
May
20
revised Number sequence - arithmetic sequence difference constant - find formula
added 179 characters in body
May
16
revised Find the value of : $\cos x \cos 2x…\cos 999x$ given that $x=\frac {2\pi}{1999}$
added 72 characters in body
May
16
revised Find the value of : $\cos x \cos 2x…\cos 999x$ given that $x=\frac {2\pi}{1999}$
added 326 characters in body
May
16
revised Find the value of : $\cos x \cos 2x…\cos 999x$ given that $x=\frac {2\pi}{1999}$
added 326 characters in body
May
15
revised Solving for $x$ in an equation with a summation symbol
added 13 characters in body
May
15
revised Solving for $x$ in an equation with a summation symbol
added 13 characters in body
May
13
revised How to prove this logarithm equation?
added 92 characters in body
May
10
revised Solving equations including floor function.
added 110 characters in body
May
10
revised Gradient of the tangent to the curve
added 42 characters in body
May
8
revised Improving my method for evaluating the limit of this function
added 2 characters in body
May
8
revised Consider the number $N=2015^{2015}$. What is the remainder of $N$ when it is divided by $4$? $11$? $44$?
added 135 characters in body
May
6
revised Find solutions to $\cot(x)+\csc(x)=\sqrt3$ in range $[0,2\pi]$
added 67 characters in body