a question on trigonometry
5080
How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression?
16270
Trigonometry question: $\sin^2(A) + \sin^2(B) - \sin^2(C) = 2\sin(A)\sin(B)\cos(C).$
84420
When is $\sin(x) = \cos(x)$?
27628
Solving $a \sin\theta + b \cos\theta = c$
5747
$\cos(\arcsin(x)) = \sqrt{1 - x^2}$. How?
58932
Hard contest type trigonometry proof
96367
Intuition of Addition Formula for Sine and Cosine
58483
Determining the general solution for the trigonometric equation $ 5\cos(x)-12\sin (x) = 13 $
70402
Geometry Triangle Question 3
35244
Prove $\sin^2\theta + \cos^2\theta = 1$
5642
Geometry with Trigonometry
89003
Finding a trigonometric polynomial
126904
math.sin incorrect result
120444
Trigonometric Triangle Equality
69472
Trigonometry Ferris Wheel Question
61339
Integrating trigonometric function problem $\int \frac{3\sin x+2\cos x}{2\sin x+3\cos x}dx$
29604
How to solve $\sin x +\cos x = 1$?