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  2. 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 ...

  3. Orders of magnitude (mass) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(mass)

    The tonne (t) is an SI-compatible unit of mass equal to a megagram (Mg), or 10 3 kg. The unit is in common use for masses above about 10 3 kg and is often used with SI prefixes. For example, a gigagram ( Gg ) or 10 9 g is 10 3 tonnes, commonly called a kilotonne .

  4. Kilogram-force - Wikipedia

    en.wikipedia.org/wiki/Kilogram-force

    [citation needed] The kilogram-force is equal to the magnitude of the force exerted on one kilogram of mass in a 9.806 65 m/s 2 gravitational field (standard gravity, a conventional value approximating the average magnitude of gravity on Earth). [2] That is, it is the weight of a kilogram under standard gravity. One kilogram-force is defined as ...

  5. 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.

  6. Tonne - Wikipedia

    en.wikipedia.org/wiki/Tonne

    The tonne (/ t ʌ n / ⓘ or / t ɒ n /; symbol: t) is a unit of mass equal to 1,000 kilograms.It is a non-SI unit accepted for use with SI.It is also referred to as a metric ton in the United States to distinguish it from the non-metric units of the short ton (United States customary units) and the long ton (British imperial units).

  7. 110 Festive Holiday Desserts To Make Your Christmas Spread ...

    www.aol.com/97-festive-holiday-desserts...

    Peanut Butter Blossoms. As the story goes, a woman by the name of Mrs. Freda F. Smith from Ohio developed the original recipe for these for The Grand National Pillsbury Bake-Off competition in 1957.

  8. Ton - Wikipedia

    en.wikipedia.org/wiki/Ton

    A ton of TNT or tonne of TNT is a unit of energy equal to 10 9 (thermochemical) calories, also known as a gigacalorie (Gcal), equal to 4.184 gigajoules (GJ). A kiloton of TNT or kilotonne of TNT is a unit of energy equal to 10 12 calories, also known as a teracalorie (Tcal), equal to 4.184 terajoules (TJ).

  9. 29 House Republicans want Trump to scrap the IRS's free ... - AOL

    www.aol.com/29-house-republicans-want-trump...

    The IRS has gradually rolled out a program to allow Americans to directly file taxes with the IRS. It's designed to make filing taxes simpler and easier.