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  2. Proofs of trigonometric identities - Wikipedia

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

    The proofs given in this article use these definitions, and thus apply to non-negative angles not greater than a right angle. For greater and negative angles , see Trigonometric functions . Other definitions, and therefore other proofs are based on the Taylor series of sine and cosine , or on the differential equation f ″ + f = 0 ...

  3. Small-angle approximation - Wikipedia

    en.wikipedia.org/wiki/Small-angle_approximation

    There are a number of ways to demonstrate the validity of the small-angle approximations. The most direct method is to truncate the Maclaurin series for each of the trigonometric functions. Depending on the order of the approximation , cos ⁡ θ {\displaystyle \textstyle \cos \theta } is approximated as either 1 {\displaystyle 1} or as 1 − 1 ...

  4. Goldbach's conjecture - Wikipedia

    en.wikipedia.org/wiki/Goldbach's_conjecture

    In 1930, Lev Schnirelmann proved that any natural number greater than 1 can be written as the sum of not more than C prime numbers, where C is an effectively computable constant; see Schnirelmann density. [13] [14] Schnirelmann's constant is the lowest number C with this property. Schnirelmann himself obtained C < 800 000.

  5. Differentiation of trigonometric functions - Wikipedia

    en.wikipedia.org/wiki/Differentiation_of...

    We conclude that for 0 < θ < ⁠ 1 / 2 ⁠ π, the quantity sin(θ)/θ is always less than 1 and always greater than cos(θ). Thus, as θ gets closer to 0, sin(θ)/θ is "squeezed" between a ceiling at height 1 and a floor at height cos θ, which rises towards 1; hence sin(θ)/θ must tend to 1 as θ tends to 0 from the positive side:

  6. Uncle Petros and Goldbach's Conjecture - Wikipedia

    en.wikipedia.org/wiki/Uncle_Petros_and_Goldbach's...

    Uncle Petros and Goldbach's Conjecture is a 1992 novel by Greek author Apostolos Doxiadis.It concerns a young man's interaction with his reclusive uncle, who sought to prove a famous unsolved mathematics problem, called Goldbach's Conjecture, that every even number greater than two is the sum of two primes.

  7. Can alcohol cause cancer? Here's what the science says

    www.aol.com/news/alcohol-cause-cancer-heres...

    He added the death toll of alcohol-related cancer deaths was higher than the 13,500 deaths from drunken driving crashes annually in the U.S. But, he said, "the majority of Americans are unaware of ...

  8. Roberts warns against ignoring Supreme Court rulings as ...

    www.aol.com/news/roberts-warns-against-ignoring...

    The report lands at the end of a year in which the conservative 6-3 majority granted former presidents sweeping immunity from criminal prosecution – and on a timeline that allowed Trump to avoid ...

  9. FACT CHECK: Can Donald Trump Actually Run For A Third ... - AOL

    www.aol.com/fact-check-donald-trump-actually...

    A post on X shows Trump ally Steve Bannon stating that President-Elect Donald Trump can actually run for a third term as President by law. Verdict: False The 22nd amendment of the U.S ...

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