How do computers calculate an angle from its trig value(s)? How did mathematicians calculate them without computers?
64268
How does a calculator calculate the sine, cosine, tangent using just a number?
90708
Comparing angles and working out the difference
138236
What is the sum of the angles of a triangle on Earth orbit?
46886
Is there an algorithm for converting quaternion rotations to Euler angle rotations?
103359
Why are radians more natural than any other angle unit?
67035
History of dot product and cosine
126630
How to compute the integral of trigonometic function with multiple angle
83290
How is the value of $\pi$ ( Pi ) actually calculated?
60709
How do I get $\cos{\theta} \lt \frac{\sin{\theta}}{\theta} \lt 1$?
105483
How does atan2 work when getting angle of a vector?
130470
Find the angle ADE of the given triangle.
63679
Picture/intuitive proof of $\cos(3 \theta) = 4 \cos^3(\theta)-3\cos(\theta)$?
7898
Finding square root without using sqrt function?
56151
Mental estimate for tangent of an angle (from $0$ to $90$ degrees)
104427
Sines and cosines of angles in arithmetic progression
58958
How to understand dot product is the angle's cosine?
67988
Trigonometric curiosity