Sum and difference of tangents in degrees
42391
Calculate $\tan9^{\circ}-\tan27^{\circ}-\tan63^{\circ}+\tan81^{\circ}$
101434
To find tangents to given circle from a point outside it
115737
Tangent and Normal lines that pass through the origin
7891
Sum of nth roots of unity
135543
Proof of Angles going beyond 90 degrees in Trigonometry
28890
Why does the tangent of numbers very close to $\frac{\pi}{2}$ resemble the number of degrees in a radian?
24000
Roots of Sum of Two Polynomials (with Known Roots)
104701
Find the functions for which the area of the triangle made by tangent at a point is independent of the point
9479
$\sum \cos$ when angles are in arithmetic progression
23629
Aligning tangents of graphs
91251
$n$th derivative of $e^{ax}\sin(bx+c)$
40952
Showing that sum of angles of hyperbolic triangle is strictly less than $\pi$
75570
Easy way of memorizing values of sine, cosine, and tangent
53152
Find a circle's radius with three known tangent lines
112314
On The Range Of The Tangent
89567
Common tangent to a curve
114414
Sum of $\sum_{k=1}^n\sin{k\theta}$