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Feb
1
answered Show that $\frac{1}{1+k}=\frac{\frac{1}{k}}{1+\frac{1}{k}}\leq \ln(1+\frac{1}{k})\leq\frac{1}{k}$
Jan
23
answered Finding $\sum_{k=1}^{\infty}k^2 \frac{2^{k-1}}{3^k}$
Jan
20
answered Solving SVM classifier with two weight vectors
Jan
11
answered How to prove $\cos \theta + \sin \theta =\sqrt{2} \cos\theta$.
Jan
9
asked Maximize $Ax^{m-1}(1-x)^{n-1} - Bx^{m-2}(1-x)^{n}$
Oct
26
asked Orthogonality of stochastic matrix
Oct
11
answered Evaluate $\int_{0}^{\frac{1}{2}}\ x\cos(\pi x)\,\mathrm{d}x$
Sep
30
answered find $\det(\det(A)B[\det(B)A^{-1}])$
Jun
20
answered How to prove that $\lim_{n\to\infty} \frac{1}{2}\tan(\frac{x}{2}) + … + (\frac{1}{2^{n}}) \tan(\frac{x}{2^{n}}) $ = $\frac{1}{x}-\cot(x)$
Mar
23
answered Prove that if $\alpha, \beta, \gamma$ are angles in triangle, then $(tan(\frac{\alpha}{2}))^2+(tan(\frac{\beta}{2}))^2+(tan(\frac{\gamma}{2}))^2\geq1$
Mar
23
answered Simple integral calculation: $\int \sqrt{x^2-4}\,dx$
Mar
18
answered Prove Trigonometric Identitiy
Mar
17
answered Why (x'Ay)^2 <=(x'Ax)(y'Ay), when A is positive definite?
Mar
11
answered Positive numbers inequality
Mar
11
answered Evaluating $\int_0^{\pi/2} \frac{a}{a^2+\cos^2 \theta} \, d\theta$
Mar
11
answered how to show $\frac{1+\cos x+\sin x}{1+\cos x-\sin x} = \frac{1+\sin x}{\cos x}$
Mar
11
answered Prove $(1 +\frac{ 1}{n}) ^ {n} \ge 2$
Feb
14
answered Divide By Vector
Feb
13
answered Evaluating $\lim_{n\to\infty}\small\left(\frac{1}{\sqrt{n}\sqrt{n+1}}+\frac{1}{\sqrt{n}\sqrt{n+2}}+\cdots+\frac{1}{\sqrt{n}\sqrt{n+n}}\right)$
Dec
6
answered How to prove that $A^2$ is a symmetric matrix