How to evaluate this? (Trigonometry)
50777
Prove that $4\sin\frac{2\pi}{7}- \tan\frac{\pi}{7}= \sqrt{7}$ .
38271
Which is the easiest way to evaluate $\int \limits_{0}^{\pi/2} (\sqrt{\tan x} +\sqrt{\cot x})$?
7388
Evaluate: $\int_0^{\pi} \ln \left( \sin \theta \right) d\theta$
147641
How to evaluate $\int \frac { \sin x+\cos x }{ \sin^4 x+\cos^4x}\, dx$?
7795
Find the inverse of a Trig Matrix
124440
Evaluate this power series
155422
Evaluating $\int_{0}^{\frac{\pi}{2}}\frac{\sqrt{\sin x}}{\sqrt{\sin x}+\sqrt{\cos x}}\, \mathrm{d}x$
142673
Evaluate $\tan^{2}(20^{\circ}) + \tan^{2}(40^{\circ}) + \tan^{2}(80^{\circ})$
111601
Evaluating $\int \tan^{1/3}(\theta) d \theta$
51787
Evaluate $\int \cos(3x) \sin(2x) \, dx$.
138230
Evaluate $ \int^{\frac{\pi}{2}}_0 \frac{\sin x}{\sin x+\cos x}\,dx $ using substitution $t=\frac{\pi}{2}-x$
89309
How to solve this trigonometric system of equations numerically?
66872
Exact values of $\cos(2\pi/7)$ and $\sin(2\pi/7)$
149913
Evaluate $\iint dy\,dx;\frac{\pi}{4}\leq\theta \leq\frac{3\pi}{4};0\leq r\leq2$
95979
Trigonometry and algebra question
156485
How to evaluate $\int_{0}^{2\pi}e^{\cos \theta}\cos( \sin \theta) d\theta$?
83290
How is the value of $\pi$ ( Pi ) actually calculated?