Finding Values on the Unit Circle! (Sine, cosine) #maths #calculus #unitcircle #trigonometry

A quick way to find values on the unit circle in the first quadrant!In this video I show how to sketch the values corresponding to 0, pi/6, pi/4, pi/3, and pi/2 on the unit circle.Using those values I show how to evaluate sine and cosine.This is useful info for those of you in precalculus or calculus!

https://authorjonathandavid.com/precalculus/finding-values-on-the-unit-circle-sine-cosine-maths-calculus-unitcircle-trigonometry/

#xkcd: #UnitCircle

https://xkcd.com/3041/

#Humour #Cartoon

Just released: Trigonometry Basics Cheat Sheet by dontwanttofail

Download it free at http://www.cheatography.com/dontwanttofail/cheat-sheets/trigonometry-basics/?utm_source=mastodon

@cheatsheets #CheatSheet #CheatSheets #math #trigonometry #unitcircle #pythagoreantheory #sin- #cos- #tan- #csc- #sec- #cot- #radiansanddegrees

Happy Tau Day!

https://fractalkitty.com/2021/06/28/spotted-tau-hee/

#tau #pi #math #birds #birb #towhee #mathart #mtbos #UnitCircle

This is a short, animated visual proof demonstrating Jordan’s inequality, which is an equality providing upper and lower bounds for the sine function over the interval [0, pi/2].

Jordan’s Inequality Visual Proof

#Theorem #VisualProof #Algebra #animation #circle #inequality #jordanInequality #Math #MathematicalVisualProofs #Mathematics #nowWatching #unitCircle #YouTube

Seen on TBBBS:

1. Consider a random #polynomial with degree "n"

\[
P(z) = a_n z^n + ... + a_1 z + a_0
\]

where the coefficients are random complex Gaussian numbers.

Choose the degree "n" large.

2. Compute the #complex roots and plot them.

3. Wonder why they concentrate on the #UnitCircle

From here:

https://twitter.com/i/status/1600132699800289280