Value of a trigonometric series
49028
Find the sum : $\frac{1}{\cos0^\circ\cos1^\circ}+\frac{1}{\cos1^\circ \cos2^\circ} +\frac{1}{\cos2^\circ \cos3^\circ}+......+$
113713
Closed formula for the sum of the following series
149240
Divergence of a series
37855
Sums and harmonic series
42424
Riemann sum of $\sin(x)$
114414
Sum of $\sum_{k=1}^n\sin{k\theta}$
109807
For what values of $a$ the series $\sum \limits_{n=1}^{\infty} \frac{a^n}{n^\sqrt n}$ converges?
83641
The sum of the series $\frac{15}{16}+\frac{15}{16} \times \frac{21}{24}+\frac{15}{16} \times \frac{21}{24} \times \frac{27}{32}+\dots$
47572
Evaluate $ \sum_{n=1}^{\infty} \frac{\sin \ n}{ n } $ using the fourier series
34590
Fourier series of Log sine and Log cos
20945
On a series involving harmonic numbers
58262
Find the sum of the series $1+\frac{1}{3}\cdot\frac{1}{4}+\frac{1}{5}\cdot\frac{1}{4^2}+\frac{1}{7}\cdot\frac{1}{4^3}+\cdots$
99328
Value of $\sin (2^\circ)\cdot \sin (4^\circ)\cdot \sin (6^\circ)\cdots \sin (90^\circ) $
118586
Confused About Trigonometric Substitution
76941
How do you find the value of $\sum_{r=0}^{44} \tan^2(2r+1)$?
26491
Sum function of a series
35036
Series $\sum_{n=1}^{\infty}\frac{\cos(nx)}{n^2}$