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 May 7 revised Functions Question Completing the math markup. May 7 comment What is the non-piecewise curve that resembles the following roller coaster track? I cannot show my effort to solve this problem. Is it necessary to show it? May 7 comment Functions Question Commutative by accident. May 7 suggested approved edit on Functions Question May 7 asked What is the non-piecewise curve that resembles the following roller coaster track? May 6 revised How to determine the coordinate of roller coaster's wheels? added 366 characters in body May 6 asked How to determine the coordinate of roller coaster's wheels? Mar 26 answered $\cos(x)+\cos(3x)+…\cos(2n-1)x=\sin(2nx)/2\sin(x)$ Mar 26 asked Is there any other method to solve $\sin x -\sqrt 3 \cos x=1$? Mar 15 revised Integral by parts of this function added 41 characters in body Mar 15 answered Integral by parts of this function Mar 15 accepted How to find 3-order $f(x)$ if its remainders are $2x-1$ and $3x-3$ when $f(x)$ is divided by $x^2+x-2$ and $x^2+x-3$, respectively? Mar 15 awarded Yearling Mar 15 asked How to find 3-order $f(x)$ if its remainders are $2x-1$ and $3x-3$ when $f(x)$ is divided by $x^2+x-2$ and $x^2+x-3$, respectively? Mar 12 accepted What is the explicit formula for the sequence representing the number of any triangles in a triangular grid? Mar 12 accepted What are the names in English for Alterando, Invertendo, Componendo and Dividendo? Mar 12 accepted How to prove that we cannot see more than 3 faces of an opaque solid cube simultaneously? Mar 11 accepted How to find the closed solution for the following recursive vector equations? Mar 11 accepted How to prove the number of images of two mirrors inclined at $A$ is $360/A -1$ Mar 11 accepted How can we analytically know 34! equals to zero for the following C# code?