TheJoker
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 Dec3 revised Complex solutions of $\sin z = i \alpha \cos z$ explained the particular solution Nov18 revised In terms of complexity, is there a quicker way of checking if a matrix is nonsingular than computing the determinant? added 919 characters in body Nov15 revised Where does the Chi-square equation come from? added 480 characters in body Nov15 revised Where does the Chi-square equation come from? added 480 characters in body Nov15 revised Finding coefficients of quadratic given one tangent and point on the curve added 389 characters in body Nov15 revised What is degree of freedom in statistics? added 11 characters in body Nov14 revised Example of a general random variable with finite mean but infinite variance clarified the answer.. Nov13 revised chi-square distribution: determining the constants c and d latexified Nov11 revised How can I use residue theory to verify this integral formula? edited tags Nov9 revised Normal Approximation to find probability of stopping at a red light at least 15 times added 328 characters in body, adrrectionded concept of conyinuity co Nov2 revised Connectedness of the boundary edited tags Oct13 revised Triangle problem edited tags Oct13 revised An example of the maximum of $f(x)$ and the maximum of $g(x)$ does not to equal to the maximum of $(f+g)(x)$ clarified a question in comments Oct13 revised Let $m \in \mathbb Z, m>1$, then $\cos(2 \pi/m) \in \mathbb Q$ if and only if $m \in \{1,2,3,4,6\}$. corrected some errors,improved formatting Oct13 revised Let $m \in \mathbb Z, m>1$, then $\cos(2 \pi/m) \in \mathbb Q$ if and only if $m \in \{1,2,3,4,6\}$. corrected some errors Oct11 revised Probability mass function and conditional probabilities added 182 characters in body Oct10 revised An angle $\theta$ can be trisected if and only if $4x^3-3x+\cos\theta$ is reducible over $\mathbb{Q}(\cos\theta)$ added 110 characters in body Oct10 revised An angle $\theta$ can be trisected if and only if $4x^3-3x+\cos\theta$ is reducible over $\mathbb{Q}(\cos\theta)$ added 309 characters in body Oct10 revised An angle $\theta$ can be trisected if and only if $4x^3-3x+\cos\theta$ is reducible over $\mathbb{Q}(\cos\theta)$ misinterpreted the question Oct8 revised Where are we using $C^1$ in this proof? error, completely flawed argument.