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  2. Radian - Wikipedia

    en.wikipedia.org/wiki/Radian

    Hence an angle of 1.2 radians would be written today as 1.2 rad; archaic notations include 1.2 r, 1.2 rad, 1.2 c, or 1.2 R. In mathematical writing, the symbol "rad" is often omitted. When quantifying an angle in the absence of any symbol, radians are assumed, and when degrees are meant, the degree sign ° is used.

  3. Degree (angle) - Wikipedia

    en.wikipedia.org/wiki/Degree_(angle)

    A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle in which one full rotation is 360 degrees. [ 4 ] It is not an SI unit —the SI unit of angular measure is the radian —but it is mentioned in the SI brochure as an accepted unit . [ 5 ]

  4. Angle - Wikipedia

    en.wikipedia.org/wiki/Angle

    A similar calculation using the area of a circular sector θ = 2A/r 2 gives 1 radian as 1 m 2 /m 2 = 1. [30] The key fact is that the radian is a dimensionless unit equal to 1. In SI 2019, the SI radian is defined accordingly as 1 rad = 1. [31] It is a long-established practice in mathematics and across all areas of science to make use of rad ...

  5. Turn (angle) - Wikipedia

    en.wikipedia.org/wiki/Turn_(angle)

    A comparison of angles expressed in degrees and radians. The number 2 ... ⁠ 𝜏 / 10 ⁠ rad ⁠ π / 5 ⁠ rad 36° 40 g ⁠ 1 / 8 ...

  6. Exact trigonometric values - Wikipedia

    en.wikipedia.org/wiki/Exact_trigonometric_values

    Additionally, an angle that is a rational multiple of radians is constructible if and only if, when it is expressed as / radians, where a and b are relatively prime integers, the prime factorization of the denominator, b, is the product of some power of two and any number of distinct Fermat primes (a Fermat prime is a prime number one greater ...

  7. Milliradian - Wikipedia

    en.wikipedia.org/wiki/Milliradian

    1 / 1000 ⁠ rad ... 40 cm 40 mm 4 cm 500 m 500 mm 50 cm 50 mm 5 cm 600 m ... Degrees Minute of arc; 1 milliradian = 1: 1.018 592: 0.954 930:

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  9. Gradian - Wikipedia

    en.wikipedia.org/wiki/Gradian

    [18] [19] Today, the degree, ⁠ 1 / 360 ⁠ of a turn, or the mathematically more convenient radian, ⁠ 1 / 2 π ⁠ of a turn (used in the SI system of units) is generally used instead. In the 1970s – 1990s, most scientific calculators offered the gon, as well as radians and degrees, for their trigonometric functions . [ 23 ]