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  2. 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.

  3. Proofs of trigonometric identities - Wikipedia

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

    Illustration of the sum formula. Draw a horizontal line (the x -axis); mark an origin O. Draw a line from O at an angle α {\displaystyle \alpha } above the horizontal line and a second line at an angle β {\displaystyle \beta } above that; the angle between the second line and the x -axis is α + β . {\displaystyle \alpha +\beta .}

  4. Trigonometric functions - Wikipedia

    en.wikipedia.org/wiki/Trigonometric_functions

    Basis of trigonometry: if two right triangles have equal acute angles, they are similar, so their corresponding side lengths are proportional.. In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) [1] are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.

  5. List of formulas in elementary geometry - Wikipedia

    en.wikipedia.org/wiki/List_of_formulas_in...

    Area#Area formulas – Size of a two-dimensional surface; Perimeter#Formulas – Path that surrounds an area; List of second moments of area; List of surface-area-to-volume ratios – Surface area per unit volume; List of surface area formulas – Measure of a two-dimensional surface; List of trigonometric identities

  6. Trigonometry - Wikipedia

    en.wikipedia.org/wiki/Trigonometry

    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.

  7. Trump wants a US sovereign wealth fund. Here's what that ...

    www.aol.com/trump-wants-us-sovereign-wealth...

    James Broughel, a senior fellow at the Competitive Enterprise Institute, a nonprofit that advocates for deregulation, pointed out that the fact sheet accompanying the executive order alludes to $5 ...

  8. CRC Standard Mathematical Tables - Wikipedia

    en.wikipedia.org/wiki/CRC_Standard_Mathematical...

    The 30th edition (1996) was renamed CRC Standard Mathematical Tables and Formulae, with Daniel Ian Zwillinger as the editor-in-chief. [2] The 33rd edition (2018) was renamed CRC Standard Mathematical Tables and Formulas. [3]

  9. When It's Too Cold For Grocery Shopping, These 15 Meals Give ...

    www.aol.com/too-cold-grocery-shopping-15...

    These easy sheet-pan dinner sees chicken thighs marinated in Greek yogurt, cumin, coriander, and paprika, roasted on a sheet pan with red onion, then topped with a bright cucumber-tomato salad and ...