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Cosine vs X - What's the difference?

cosine | x |

As a noun cosine

is (trigonometry) in a right triangle, the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse symbol: cos.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

cosine

English

(wikipedia cosine)

Noun

(en noun)
  • (trigonometry) In a right triangle, the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse. Symbol: cos

    • Usage notes

    In various branches of mathematics, the cosine of an angle is determined in various ways, including the following: * The x''-coordinate]] of the point on the unit circle at the given anticlockwise angle from the [[x-axis, ''x -axis. * The sum of the real or complex power series

         \sum_{n=0}^\infty \frac{(-1)^n x^{2n}}{(2n)!} = 1 - {x^2 \over 2} + {x^4 \over 24} - {x^6 \over 720} + {x^8 \over 40320} - \cdots

    where x is in radians.

    Related terms

    * arccosine * sine

    See also

    * power series * secant * tangent * trigonometry

    Anagrams

    * * ----

    x

    Translingual

    {{Basic Latin character info, previous=W, next=Y, image= (wikipedia X)

    Etymology 1

    Letter

  • The twenty-fourth letter of the .
    • See also
    (Latn-script)

    Cardinal number

    (mul-number)
  • The number 10.

    • Symbol

    (mul-symbol)
  • A symbol of the IPA, representing a voiceless uvular fricative.
  • strike

    • Etymology 2

    Possibly from skull and crossbones

    Symbol

    (mul-symbol)
    • Derived terms
    * XXX

    See also

    {{Letter , page=X , NATO=X-ray , Morse=–··– , Character=X , Braille=? }} Image:Latin X.png, Capital and lowercase versions of X , in normal and italic type Image:Fraktur letter X.png, Uppercase and lowercase X in Fraktur Roman numerals ----