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  2. 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.

  3. Pythagorean trigonometric identity - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_trigonometric...

    which by the Pythagorean theorem is equal to 1. This definition is valid for all angles, due to the definition of defining x = cos θ and y sin θ for the unit circle and thus x = c cos θ and y = c sin θ for a circle of radius c and reflecting our triangle in the y-axis and setting a = x and b = y.

  4. CORDIC - Wikipedia

    en.wikipedia.org/wiki/CORDIC

    CORDIC (coordinate rotation digital computer), Volder's algorithm, Digit-by-digit method, Circular CORDIC (Jack E. Volder), [1] [2] Linear CORDIC, Hyperbolic CORDIC (John Stephen Walther), [3] [4] and Generalized Hyperbolic CORDIC (GH CORDIC) (Yuanyong Luo et al.), [5] [6] is a simple and efficient algorithm to calculate trigonometric functions, hyperbolic functions, square roots ...

  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. Search continues for missing girl swept away in Texas floodwaters

    www.aol.com/8-old-oklahoma-girl-still-042850262.html

    SHERMAN – Thursday marked Day 3 in the Texas search for an 8-year-old Oklahoma girl missing since she was swept away in raging waters on Christmas Eve. This followed a tragic incident on Tuesday ...

  7. Can cold weather make you sick? Your grandma wasn't entirely ...

    www.aol.com/cold-weather-sick-grandma-wasnt...

    Grandma’s warnings about catching a cold walking barefoot on a chilly floor or going outside with wet hair have some truth.. Colder temperatures, especially in winter months, won’t cause a ...

  8. 7 of the most famous American investors - AOL

    www.aol.com/finance/7-most-famous-american...

    He took a bath on rental car company Hertz, however, basically wiping out a $1.8 billion investment there as the company announced bankruptcy in 2020. 6. Ben Graham. Net worth: ...

  9. Tanh-sinh quadrature - Wikipedia

    en.wikipedia.org/wiki/Tanh-sinh_quadrature

    to transform an integral on the interval x ∈ (−1, 1) to an integral on the entire real line t ∈ (−∞, ∞), the two integrals having the same value. After this transformation, the integrand decays with a double exponential rate, and thus, this method is also known as the double exponential (DE) formula .