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  2. Exact trigonometric values - Wikipedia

    en.wikipedia.org/wiki/Exact_trigonometric_values

    Similarly / = is a constructible angle because 12 is a power of two (4) times a Fermat prime (3). But π / 9 = 20 ∘ {\displaystyle \pi /9=20^{\circ }} is not a constructible angle, since 9 = 3 ⋅ 3 {\displaystyle 9=3\cdot 3} is not the product of distinct Fermat primes as it contains 3 as a factor twice, and neither is π / 7 ≈ 25.714 ∘ ...

  3. List of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/List_of_trigonometric...

    A formula for computing the trigonometric identities for the one-third angle exists, but it requires finding the zeroes of the cubic equation 4x 3 − 3x + d = 0, where is the value of the cosine function at the one-third angle and d is the known value of the cosine function at the full angle.

  4. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    A mathematical constant is a key number whose value is fixed by an unambiguous definition, ... Pi 3.14159 26535 89793 ... [4] 1.41421 35623 73095 ...

  5. Proofs of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/Proofs_of_trigonometric...

    Identity 1: ⁡ + ⁡ = The following two results follow from this and the ratio identities. To obtain the first, divide both sides of ⁡ + ⁡ = by ⁡; for the second, divide by ⁡.

  6. 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.

  7. Tom Kim apologizes for breaking locker door after playoff ...

    www.aol.com/sports/tom-kim-apologizes-breaking...

    Tom Kim apologized on social media Monday after he damaged his locker room door following a playoff loss at the DP World Tour’s Genesis Championship in South Korea on Sunday.

  8. Saudi Exchange - Wikipedia

    en.wikipedia.org/wiki/Saudi_Exchange

    Saudi Exchange (Arabic: تداول السعودية ‎) or Tadāwul (Arabic: تداول ‎) is a stock exchange in Saudi Arabia. Tadāwul was formed in 2007 as a joint stock company and the sole entity authorized to act as a securities exchange in Saudi Arabia, but trading began in 1954 as an informal financial market.

  9. Public Investment Fund - Wikipedia

    en.wikipedia.org/wiki/Public_Investment_Fund

    The wealth fund is controlled by Crown Prince Mohammed bin Salman, Saudi Arabia's de facto ruler since 2015. [4] [5] More than 60% of the fund's activities are within Saudi Arabia. [6] Within Saudi Arabia, the fund's investments primarily go to private conglomerates owned by prominent Saudi business families who have close ties to the Saudi ...

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