How to solve this trigonometry question?
4573
Explicitly finding the sum of $\arctan(1/(n^2+n+1))$
43183
basic geometry angle problem
86894
Finding solution of a Trigonometric equation
120148
prove this properties of triangles trigonometric question
128661
Geometry question on right triangle
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Can someone explain this trigonometric limit?
27628
Solving $a \sin\theta + b \cos\theta = c$
12442
Solution of tanx = x?
130470
Find the angle ADE of the given triangle.
46394
If $\frac{\cos \alpha}{\cos \beta}+\frac{\sin \alpha}{\sin \beta}=-1$, find $\frac{\cos^3\beta}{\cos \alpha}+\frac{\sin^3\beta}{\sin \alpha}$.
37108
Solve $\cos(z)=\frac 34+\frac i4$
126630
How to compute the integral of trigonometic function with multiple angle
81102
Cosine of the sum of two solutions of trigonometric equation $a\cos \theta + b\sin \theta = c$
4704
How to find an ellipse , given 2 passing points and the tangents at them?
70765
If $\frac{\tan(a+b-c)}{\tan(a-b+c)}=\frac{\tan c}{\tan b}$, then $\sin(b-c)=0$ or $\sin 2a + \sin2b + \sin 2c=0$
88432
A problem on range of a trigonometric function: what is the range of $\frac{\sqrt{3}\sin x}{2+\cos x}$?
154231
Solving trigonometric equations without a calculator or tables