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  2. List of South Korean visas - Wikipedia

    en.wikipedia.org/wiki/List_of_South_Korean_visas

    B-2-1: Tourist/Transit (General) B-2-2: Tourist/Transit (Jeju); visiting Jeju Island within 30 days; The B-2 status allows travelers who are passport holders of various jurisdictions, including the Mainland China, to stay in South Korea for a maximum period of 30 days, provided that they are using Incheon International Airport as a transit stopover.

  3. Visa policy of South Korea - Wikipedia

    en.wikipedia.org/wiki/Visa_policy_of_South_Korea

    Foreigners who have a D-2 visa are prohibited from working full-time. [45] 2009 saw concern raised over Chinese nationals who overstayed their visas. There was an 11.7 times increase in overstays on the D-2 and other visas. It was also reported that "a number" of those entering on D-2 visas from China were doing so only to find a job illegally ...

  4. Immigration to South Korea - Wikipedia

    en.wikipedia.org/wiki/Immigration_to_South_Korea

    The D-2 student visa is available to foreigners enrolled in an eligible university or language program. South Korea also offers a temporary resident visa which allows stays for up to five years, known as the F-4 visa. There is the F-2 visa, which allows residency by marrying a South Korean citizen.

  5. Visa requirements for South Korean citizens - Wikipedia

    en.wikipedia.org/wiki/Visa_requirements_for...

    Visa on Arrival is only granted at Bengaluru, Chennai, Delhi, Hyderabad, Kolkata and Mumbai airport. South Korean citizens can also apply for e-Visa online for 30 days. e-Visa holders must arrive via 31 designated airports [Note 2] or 5 designated seaports. [Note 3] [112] An Indian e-Tourist Visa may only be obtained twice within 1 calendar year.

  6. List of trigonometric identities - Wikipedia

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

    Ptolemy's theorem states that the sum of the products of the lengths of opposite sides is equal to the product of the lengths of the diagonals. When those side-lengths are expressed in terms of the sin and cos values shown in the figure above, this yields the angle sum trigonometric identity for sine: sin(α + β) = sin α cos β + cos α sin β.

  7. South Korean nationality law - Wikipedia

    en.wikipedia.org/wiki/South_Korean_nationality_law

    However, many concessions have since been made in service of advancing the economic interests of South Korea. In 2007, legislation was introduced to allow high-skilled foreigners to obtain D-10 visas. Prior to this, foreigners were required to secure employment in South Korea to be deemed eligible for a visa.

  8. Visa requirements for Singapore citizens - Wikipedia

    en.wikipedia.org/wiki/Visa_requirements_for...

    North Korea: Visa required [146] √ South Korea: Visa not required [147] [148] 90 days Singapore citizens can enter South Korea up to 90 days without a visa. [149] A K-ETA application can be completed up to 24 hours before boarding a flight. It will be valid for 3 years. [149]

  9. Small-angle approximation - Wikipedia

    en.wikipedia.org/wiki/Small-angle_approximation

    The sine and tangent small-angle approximations are used in relation to the double-slit experiment or a diffraction grating to develop simplified equations like the following, where y is the distance of a fringe from the center of maximum light intensity, m is the order of the fringe, D is the distance between the slits and projection screen ...