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  2. History of mathematical notation - Wikipedia

    en.wikipedia.org/wiki/History_of_mathematical...

    From this derives the modern-day usage of 60 seconds in a minute, 60 minutes in an hour, and 360 (60 × 6) degrees in a circle, as well as the use of minutes and seconds of arc to denote fractions of a degree. Babylonian advances in mathematics were facilitated by the fact that 60 has many divisors: the reciprocal of any integer which is a ...

  3. Sine and cosine - Wikipedia

    en.wikipedia.org/wiki/Sine_and_cosine

    In mathematics, sine and cosine are trigonometric functions of an angle. The sine and cosine of an acute angle are defined in the context of a right triangle: for the specified angle, its sine is the ratio of the length of the side that is opposite that angle to the length of the longest side of the triangle (the hypotenuse ), and the cosine is ...

  4. Trigonometric functions - Wikipedia

    en.wikipedia.org/wiki/Trigonometric_functions

    Basis of trigonometry: if two right triangles have equal acute angles, they are similar, so their corresponding side lengths are proportional.. In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) [1] [2] are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.

  5. Georgia No. 1 in preseason AP Top 25 and Ohio State No ... - AOL

    www.aol.com/news/georgia-no-1-preseason-ap...

    August 12, 2024 at 2:54 PM. Georgia is No. 1 in The Associated Press Top 25 preseason college football poll for the second straight year as the superconference era begins with the SEC and Big Ten ...

  6. Age is just a number in drag racing, where older drivers like ...

    www.aol.com/sports/age-just-number-drag-racing...

    Antron Brown, 48, has 75 career Top Fuel victories, winning titles in 2012, 2015 and 2016. Matt Hagan, 41, picked up his 50th Funny Car victory in April and the reigning champ was nominated as ...

  7. Exact trigonometric values - Wikipedia

    en.wikipedia.org/wiki/Exact_trigonometric_values

    The values of sine and cosine of 30 and 60 degrees are derived by analysis of the equilateral triangle. In an equilateral triangle, the 3 angles are equal and sum to 180°, therefore each corner angle is 60°. Bisecting one corner, the special right triangle with angles 30-60-90 is obtained.

  8. Angle - Wikipedia

    en.wikipedia.org/wiki/Angle

    The second of arc (or arcsecond, or just second) is ⁠ 1 / 60 ⁠ of a minute of arc and ⁠ 1 / 3600 ⁠ of a degree (n = 1,296,000). It is denoted by a double prime ( ″ ). For example, 3° 7′ 30″ is equal to 3 + ⁠ 7 / 60 ⁠ + ⁠ 30 / 3600 ⁠ degrees, or 3.125 degrees. The arcsecond is the angle used to measure a parsec: grad

  9. Gradian - Wikipedia

    en.wikipedia.org/wiki/Gradian

    In trigonometry, the gradian – also known as the gon (from Ancient Greek γωνία (gōnía) 'angle'), grad, or grade[ 1] – is a unit of measurement of an angle, defined as one-hundredth of the right angle; in other words, 100 gradians is equal to 90 degrees. [ 2][ 3][ 4] It is equivalent to ⁠ 1 400 ⁠ of a turn, [ 5] ⁠ 9 10 ⁠ of a ...