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  2. Tax Deduction and Collection Account Number - Wikipedia

    en.wikipedia.org/wiki/Tax_Deduction_and...

    A TAN application should accompany a 'proof of identity' and a 'proof of address' (photocopies) of the deductor. In the case of online applications, these documents need to be sent over mail (post/courier) to NSDL - TAN Application division. When NSDL receives the TAN application along with said documents (either through TIN FC / Online), the ...

  3. History of trigonometry - Wikipedia

    en.wikipedia.org/wiki/History_of_trigonometry

    In the early 9th century AD, Muhammad ibn Mūsā al-Khwārizmī produced accurate sine and cosine tables, and the first table of tangents. He was also a pioneer in spherical trigonometry. In 830 AD, Habash al-Hasib al-Marwazi produced the first table of cotangents.

  4. Small-angle approximation - Wikipedia

    en.wikipedia.org/wiki/Small-angle_approximation

    The small-angle approximations can be used to approximate the values of the main trigonometric functions, provided that the angle in question is small and is measured in radians : These approximations have a wide range of uses in branches of physics and engineering, including mechanics, electromagnetism, optics, cartography, astronomy, and ...

  5. Transaction authentication number - Wikipedia

    en.wikipedia.org/wiki/Transaction_authentication...

    A transaction authentication number ( TAN) is used by some online banking services as a form of single use one-time passwords (OTPs) to authorize financial transactions. TANs are a second layer of security above and beyond the traditional single-password authentication . TANs provide additional security because they act as a form of two-factor ...

  6. Trigonometry - Wikipedia

    en.wikipedia.org/wiki/Trigonometry

    v. t. e. Trigonometry (from Ancient Greek τρίγωνον (trígōnon) 'triangle', and μέτρον (métron) 'measure') [1] is a branch of mathematics concerned with relationships between angles and side lengths of triangles. In particular, the trigonometric functions relate the angles of a right triangle with ratios of its side lengths.

  7. NH RSA Title III - Wikipedia

    en.wikipedia.org/wiki/NH_RSA_Title_III

    RSA 49B also regards how town meetings are to be run. RSA 49C Local Option-City Charters [ edit ] Like RSA 49B, RSA49C defines the powers for governing, administrative and other bodies within cities in New Hampshire , although the 34 sections of RSA 49C also discuss other more specific topics such as mayors (towns in New Hampshire do not have ...

  8. Abbreviated New Drug Application - Wikipedia

    en.wikipedia.org/wiki/Abbreviated_New_Drug...

    An Abbreviated New Drug Application ( ANDA) is an application for a U.S. generic drug approval for an existing licensed medication or approved drug . The ANDA is submitted to FDA's Center for Drug Evaluation and Research, Office of Generic Drugs, which provides for the review and ultimate approval of a generic drug product.

  9. Law of tangents - Wikipedia

    en.wikipedia.org/wiki/Law_of_tangents

    Trigonometry. In trigonometry, the law of tangents or tangent rule [1] is a statement about the relationship between the tangents of two angles of a triangle and the lengths of the opposing sides. In Figure 1, a, b, and c are the lengths of the three sides of the triangle, and α, β, and γ are the angles opposite those three respective sides.