How is it solved: $\sin(x) + \sin(3x) + \sin(5x) +\dotsb + \sin(2n - 1)x =$
5080
How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression?
60902
Find general solution for the equation $1 + 2 + \cdots + (n − 1) = (n + 1) + (n + 2) + \cdots + (n + r) $
39461
What is the solution of $\cos(x)=x$?
75487
How to express trigonometric equation in terms of of given trigonometric function?
48824
Prove: $ \frac{1}{\sin 2x} + \frac{1}{\sin 4x } + \cdots + \frac{1 }{\sin 2^n x} = \cot x - \cot 2^n x $
77810
Solving Trigonometric Derivatives
53135
Find $4\cos\theta-3\sin\theta$, given that $4\sin \theta +3\cos \theta = 5$
16270
Trigonometry question: $\sin^2(A) + \sin^2(B) - \sin^2(C) = 2\sin(A)\sin(B)\cos(C).$
82170
Solve $x = \frac{1}{2}\tan(x)$
58483
Determining the general solution for the trigonometric equation $ 5\cos(x)-12\sin (x) = 13 $
84420
When is $\sin(x) = \cos(x)$?
104319
Real solution of $(\cos x -\sin x)\cdot \bigg(2\tan x+\frac{1}{\cos x}\bigg)+2=0.$
48956
Simplify $\arctan (\frac{1}{2}\tan (2A)) + \arctan (\cot (A)) + \arctan (\cot ^{3}(A)) $
147113
How to solve $2 \tan x / (1 - (\tan x)^2) = (\sin 2x)^2$?
61339
Integrating trigonometric function problem $\int \frac{3\sin x+2\cos x}{2\sin x+3\cos x}dx$
17188
Simplify $\cos(n \pi)$ and $\sin(n \pi)$ when n is an integer
60275
calculation of $\int\frac{1}{\sin^3 x+\cos^3 x}dx$ and $\int\frac{1}{\sin^5 x+\cos^5x}dx$