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  2. cis (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Cis_(mathematics)

    cis is a mathematical notation defined by cis x = cos x + i sin x, [nb 1] where cos is the cosine function, i is the imaginary unit and sin is the sine function. x is the argument of the complex number (angle between line to point and x-axis in polar form).

  3. Help:Displaying a formula - Wikipedia

    en.wikipedia.org/wiki/Help:Displaying_a_formula

    Or copy its CSS rules to your Wikipedia user stylesheet. ... FRAC for how to input fractions in various circumstances; ... \tan c, \cot d, \sec f, \csc g ...

  4. List of mathematical abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical...

    cot – cotangent function. (Also written as ctg.) coth – hyperbolic cotangent function. cov – covariance of a pair of random variables. cover – coversine function. (Also written as covers, cvs, cosiv.) covercos – covercosine function. (Also written as cvc.) covers – coversine function. (Also written as cover, cvs, cosiv.) crd ...

  5. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    4. Standard notation for an equivalence relation. 5. In probability and statistics, may specify the probability distribution of a random variable. For example, (,) means that the distribution of the random variable X is standard normal. [2] 6. Notation for proportionality.

  6. Exact trigonometric values - Wikipedia

    en.wikipedia.org/wiki/Exact_trigonometric_values

    The values of sine and cosine of 30 and 60 degrees are derived by analysis of the equilateral triangle. In an equilateral triangle, the 3 angles are equal and sum to 180°, therefore each corner angle is 60°. Bisecting one corner, the special right triangle with angles 30-60-90 is obtained.

  7. Laura Kenny: Can elite sport damage women's fertility? - AOL

    www.aol.com/laura-kenny-elite-sport-damage...

    Ectopic and miscarriage. For those who do manage to conceive, things can still go wrong. After an egg is fertilised, it should implant into the lining of the womb.

  8. Particular values of the gamma function - Wikipedia

    en.wikipedia.org/wiki/Particular_values_of_the...

    The gamma function is an important special function in mathematics.Its particular values can be expressed in closed form for integer and half-integer arguments, but no simple expressions are known for the values at rational points in general.

  9. US energy dominance would die under Trump's pledge to slash ...

    www.aol.com/us-energy-dominance-die-under...

    US shale producers would lose market share if Trump's policies slash gas prices, Bob McNally said. "You cannot have $1.50 pump prices and a thriving shale oil sector.