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  2. Angle trisection - Wikipedia

    en.wikipedia.org/wiki/Angle_trisection

    Now let x = cos 20°. Note that cos 60° = cos ⁠ π / 3 ⁠ = ⁠ 1 / 2 ⁠. Then by the triple-angle formula, cos ⁠ π / 3 ⁠ = 4x 3 − 3x and so 4x 3 − 3x = ⁠ 1 / 2 ⁠. Thus 8x 3 − 6x − 1 = 0. Define p(t) to be the polynomial p(t) = 8t 3 − 6t − 1. Since x = cos 20° is a root of p(t), the minimal polynomial for cos 20° is ...

  3. List of formulae involving π - Wikipedia

    en.wikipedia.org/wiki/List_of_formulae_involving_π

    where C is the circumference of a circle, d is the diameter, and r is the radius.More generally, = where L and w are, respectively, the perimeter and the width of any curve of constant width.

  4. Hole saw - Wikipedia

    en.wikipedia.org/wiki/Hole_saw

    Tungsten carbide hole saw with arbor A 52 mm (2.0 in) hole saw with pilot bit A 115 mm (4.5 in) diamond hole saw. A hole saw (also styled holesaw), also known as a hole cutter, [1] is a saw blade of annular (ring) shape, whose annular kerf creates a hole in the workpiece without having to cut up the core material.

  5. Approximations of π - Wikipedia

    en.wikipedia.org/wiki/Approximations_of_π

    ((x),(y) = {239, 13 2} is a solution to the Pell equation x 22 y 2 = −1.) Formulae of this kind are known as Machin-like formulae . Machin's particular formula was used well into the computer era for calculating record numbers of digits of π , [ 39 ] but more recently other similar formulae have been used as well.

  6. Pelicans suspend Zion Williamson after he was reportedly late ...

    www.aol.com/pelicans-suspend-zion-williamson...

    January 10, 2025 at 2:34 PM. New Orleans Pelicans forward Zion Williamson has been suspended by the team for one game for violating team policies. Williamson will miss Friday night's matchup ...

  7. Anthony Edwards fined $35,000 by NBA for giving middle finger ...

    www.aol.com/sports/anthony-edwards-fined-35-000...

    Edwards finished with 36 points, shooting 6 for 14 from 3-point range. He leads the NBA in 3-pointers made with 64. However, that performance was overshadowed by De'Aaron Fox exploding for 60 ...

  8. RFK Jr reviewing resumes for top Trump health jobs, sources say

    www.aol.com/news/rfk-jr-reviewing-resumes-top...

    NEW YORK (Reuters) -Robert F. Kennedy Jr, the former independent presidential candidate, is reviewing candidate resumes for the top jobs at the U.S. government's health agencies in Donald Trump's ...

  9. Euler's identity - Wikipedia

    en.wikipedia.org/wiki/Euler's_identity

    It can be seen that as N gets larger (1 + ⁠ iπ / N ⁠) N approaches a limit of −1. Euler's identity asserts that e i π {\displaystyle e^{i\pi }} is equal to −1. The expression e i π {\displaystyle e^{i\pi }} is a special case of the expression e z {\displaystyle e^{z}} , where z is any complex number .

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