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  2. Tax Deduction and Collection Account Number - Wikipedia

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

    Tax Deduction and Collection Account Number. In India, a Tax Deduction and Collection Account Number ( TAN) is a 10 digit alpha-numeric number issued by the Income Tax Department to the persons who are required to deduct or collect tax on payments made by them under the Indian Income Tax Act, 1961. [1]

  3. Tanning tax - Wikipedia

    en.wikipedia.org/wiki/Tanning_tax

    Tanning tax. The tanning tax is a ten percent federal excise tax that the U.S. government requires tanning providers to collect on indoor tanning services. Tanning service providers must pay the tax each quarter to the IRS. [1] The ten percent tax must be collected from the client, according to the IRS, similar to the collection of a sales tax.

  4. Tangent half-angle formula - Wikipedia

    en.wikipedia.org/wiki/Tangent_half-angle_formula

    This is a geometric way to prove the particular tangent half-angle formula that says tan 1 2 (a + b) = (sin a + sin b) / (cos a + cos b). The formulae sin 1 2 (a + b) and cos 1 2 (a + b) are the ratios of the actual distances to the length of the diagonal. Applying the formulae derived above to the rhombus figure on the right, it is readily ...

  5. Tantalum nitride - Wikipedia

    en.wikipedia.org/wiki/Tantalum_nitride

    Tantalum nitride (TaN) is a chemical compound, a nitride of tantalum. There are multiple phases of compounds, stoichimetrically from Ta 2 N to Ta 3 N 5, including TaN. As a thin film TaN find use as a diffusion barrier and insulating layer between copper interconnects in the back end of line of computer chips. Tantalum nitrides are also used in ...

  6. List of trigonometric identities - Wikipedia

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

    Viète. de Moivre. Euler. Fourier. v. t. e. In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles.

  7. Coulomb's law - Wikipedia

    en.wikipedia.org/wiki/Coulomb's_law

    Coulomb's inverse-square law, or simply Coulomb's law, is an experimental law [1] of physics that calculates the amount of force between two electrically charged particles at rest. This electric force is conventionally called the electrostatic force or Coulomb force. [2] Although the law was known earlier, it was first published in 1785 by ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. 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 ...

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