Finding value (Trigo Series)
9479
$\sum \cos$ when angles are in arithmetic progression
106707
How to find the limit of series? (What should I know?)
43066
Finding value of $S-T$ in $2$ binomial sum.
115170
What is the formula for this numerical series?
99328
Value of $\sin (2^\circ)\cdot \sin (4^\circ)\cdot \sin (6^\circ)\cdots \sin (90^\circ) $
107270
Calculate the following series using telescoping
102339
How to compute the sum of a series
118456
Find $\sum_{n=1}^{\infty}\tan^{-1}\frac{2}{n^2}$
125171
Help with this trigonometry problem?
2676
Finding $\frac {d(\tan \theta)}{d\theta}$
106441
Find the value of $\binom{2000}{2} + \binom{2000}{5} + \binom{2000}{8} + \cdots \binom{2000}{2000}$
56195
Find the minimum value of $\sin^{2} \theta +\cos^{2} \theta+\sec^{2} \theta+\csc^{2} \theta+\tan^{2} \theta+\cot^{2} \theta$
60774
Find the value of : $\cos x \cos 2x...\cos 999x$ given that $x=\frac {2\pi}{1999}$
79125
How to find the maximum value for the given $x\cos{\lambda}+y\sin{\lambda}$?
111651
Determine if this series converges or diverges
31721
Series with specific notation
89003
Finding a trigonometric polynomial