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  2. List of flatiron buildings - Wikipedia

    en.wikipedia.org/wiki/List_of_Flatiron_buildings

    Building Image Dates Location City, Province Description; Sydney Dental Hospital: 1940 built [1]: Chalmers Street, Surry Hills Sydney, New South Wales: Streamline Moderne: Wales House, Sydney

  3. Exact trigonometric values - Wikipedia

    en.wikipedia.org/wiki/Exact_trigonometric_values

    Repeated application of the half-angle formulas leads to nested radicals, specifically nested square roots of 2 of the form . In general, the sine and cosine of most angles of the form β / 2 n {\displaystyle \beta /2^{n}} can be expressed using nested square roots of 2 in terms of β {\displaystyle \beta } .

  4. List of trigonometric identities - Wikipedia

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

    A formula for computing the trigonometric identities for the one-third angle exists, but it requires finding the zeroes of the cubic equation 4x 3 − 3x + d = 0, where is the value of the cosine function at the one-third angle and d is the known value of the cosine function at the full angle.

  5. Spherical trigonometry - Wikipedia

    en.wikipedia.org/wiki/Spherical_trigonometry

    Case 1: three sides given (SSS). The cosine rule may be used to give the angles A, B, and C but, to avoid ambiguities, the half angle formulae are preferred. Case 2: two sides and an included angle given (SAS). The cosine rule gives a and then we are back to Case 1. Case 3: two sides and an opposite angle given (SSA).

  6. One Nationwide Plaza - Wikipedia

    en.wikipedia.org/wiki/One_Nationwide_Plaza

    The building was designed by Brubaker/Brandt (the same firm that designed Rhodes State Office Tower, the tallest building in Columbus) and Harrison & Abramovitz. [1] The façade is dark vertical steel ribs bordered by white limestone ends which follows the modernist style. Blue spotlights light the exterior at night in the same color of ...

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  8. If It Seems Like Everyone Has Norovirus, It's Because They ...

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    Related: Norovirus Outbreak Linked to Louisiana Casino Leaves More than 200 People Sick To limit your risk of contracting the virus, the CDC recommends washing your hands — but cautions that ...

  9. Proofs of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/Proofs_of_trigonometric...

    The figure at the right shows a sector of a circle with radius 1. The sector is θ/(2 π) of the whole circle, so its area is θ/2. We assume here that θ < π /2. = = = ⁡ = ⁡ The area of triangle OAD is AB/2, or sin(θ)/2.

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