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  2. Bhāskara I's sine approximation formula - Wikipedia

    en.wikipedia.org/wiki/Bhāskara_I's_sine...

    The formula is given in verses 17–19, chapter VII, Mahabhaskariya of Bhāskara I. A translation of the verses is given below: [3] (Now) I briefly state the rule (for finding the bhujaphala and the kotiphala, etc.) without making use of the Rsine-differences 225, etc. Subtract the degrees of a bhuja (or koti) from the degrees of a half circle (that is, 180 degrees).

  3. Exact trigonometric values - Wikipedia

    en.wikipedia.org/wiki/Exact_trigonometric_values

    The trigonometric functions of angles that are multiples of 15°, 18°, or 22.5° have simple algebraic values. These values are listed in the following table for angles from 0° to 45°. [ 1 ] In the table below, the label "Undefined" represents a ratio 1 : 0. {\displaystyle 1:0.}

  4. List of trigonometric identities - Wikipedia

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

    In the special cases of one of the diagonals or sides being a diameter of the circle, this theorem gives rise directly to the angle sum and difference trigonometric identities. [17] The relationship follows most easily when the circle is constructed to have a diameter of length one, as shown here.

  5. Lune of Hippocrates - Wikipedia

    en.wikipedia.org/wiki/Lune_of_Hippocrates

    The lune of Hippocrates is the upper left shaded area. It has the same area as the lower right shaded triangle. In geometry, the lune of Hippocrates, named after Hippocrates of Chios, is a lune bounded by arcs of two circles, the smaller of which has as its diameter a chord spanning a right angle on the larger circle.

  6. Chord (geometry) - Wikipedia

    en.wikipedia.org/wiki/Chord_(geometry)

    In the 2nd century AD, Ptolemy compiled a more extensive table of chords in his book on astronomy, giving the value of the chord for angles ranging from ⁠ 1 / 2 ⁠ to 180 degrees by increments of ⁠ 1 / 2 ⁠ degree. Ptolemy used a circle of diameter 120, and gave chord lengths accurate to two sexagesimal (base sixty) digits after the ...

  7. PwC is using 'prompting parties' to teach employees how to ...

    www.aol.com/pwc-using-prompting-parties-teach...

    PwC hosts "prompting parties" to help employees experiment with generative AI tools. The firm's chief learning officer said employees needed a safe, low-stakes format to experiment with it.

  8. Rocky Colavito, Cleveland All-Star and curse namesake, dies at 91

    www.aol.com/sports/rocky-colavito-cleveland-star...

    Rocky Colavito, a Cleveland baseball All-Star popular enough that his trade led to a fan uproar and speculation of a curse, died Tuesday, the club announced.

  9. Proof that 22/7 exceeds π - Wikipedia

    en.wikipedia.org/wiki/Proof_that_22/7_exceeds_π

    Proofs of the mathematical result that the rational number ⁠ 22 / 7 ⁠ is greater than π (pi) date back to antiquity. One of these proofs, more recently developed but requiring only elementary techniques from calculus, has attracted attention in modern mathematics due to its mathematical elegance and its connections to the theory of Diophantine approximations.

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