love this, such a great explanation

One of the most interesting and amazing math videos that I have seen.

Another take: Ignore trigonometry! Sines and cosines are known as "circular functions". Also, ignore angles in degrees, in fact, ignore angles altogether! Just use the arc length from the x-axis anti-clockwise round the circle. Sine comes from a word meaning arc or curve. When a point moves round the curve it has a certain distance from the x-axis. That distance is the sine of that arc length. Cosines, as the name suggests, accompany sines and the cosine is the horizontal distance from the point on the arc to the y-axis. Tangent implies touching and the line through the point that touches the circle has a length between the point and the x-axis. That is the tangent of that arc length. The distance between the point and the y-axis is the cotangent. Secant implies cutting and the line that cuts the circle along the x-axis has a length between where the tangent meets the x-axis and the y-axis equal to the secant of the arc length and, yes, the cosecant is at right angles to that. All the trig stuff, including some trig identities, now follow by using similar triangles

Excellent voice and animations

Excellent information and very interesting

Excellent Job

slay queen

Good video. I am gonna use it on a trigo class soon :)

If you have done this (without Steeling the Animations) you are severely underratet