### Questions (76)

 7 Sigma notation for sum of $\ln(x)^2$ from $2$ to $20$ with steps of $0.5$ 5 Evaluate $\sum_{r=2}^{\infty} \frac{2-r}{r(r+1)(r+2)}$ 5 Integral of $\int\frac{\sin x}{\sin x+\cos x}dx$ 4 Sum of two infinite complex geometric sums 3 Show that $\int_0^{\pi/3} \frac{1}{(\cos\theta + \sqrt{3}\sin\theta)^2}\,d\theta = \frac{\sqrt3}{4}$

### Reputation (558)

 +2 Proof of inverse factorial decomposition $\frac{1}{n!}=\sum\limits^n_{i=1}\frac{(-1)^{n+i}}{(i-1)!(n+1-i)!}$ +15 Show that $\int_0^{\pi/3} \frac{1}{(\cos\theta + \sqrt{3}\sin\theta)^2}\,d\theta = \frac{\sqrt3}{4}$ +2 Derivative of $\cos x$ +2 Valid multivariate Gaussian model

### Answers (0)

This user has not answered any questions

### Tags (58)

 0 integration × 12 0 partial-derivative × 6 0 trigonometry × 11 0 derivatives × 5 0 complex-numbers × 8 0 sequences-and-series × 5 0 summation × 7 0 vectors × 5 0 trigonometric-integrals × 6 0 polynomials × 5

### Accounts (4)

 Mathematics 558 rep 314 Chemistry 420 rep 111 Physics 106 rep 4 TeX - LaTeX 106 rep 3

### Badges (16)

 Custodian × 2 Critic Inquisitive Popular Question Notable Question Curious Yearling Cleanup Citizen Patrol Supporter

### Active bounties (0)

This user has no active bounties

### Votes cast (20)

all time   by type   month
17 up 3 question 2
3 down 17 answer