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  2. Law of cotangents - Wikipedia

    en.wikipedia.org/wiki/Law_of_cotangents

    Using the usual notations for a triangle (see the figure at the upper right), where a, b, c are the lengths of the three sides, A, B, C are the vertices opposite those three respective sides, α, β, γ are the corresponding angles at those vertices, s is the semiperimeter, that is, s = ⁠ a + b + c / 2 ⁠, and r is the radius of the inscribed circle, the law of cotangents states that

  3. Hermite's cotangent identity - Wikipedia

    en.wikipedia.org/wiki/Hermite's_cotangent_identity

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  4. Residue theorem - Wikipedia

    en.wikipedia.org/wiki/Residue_theorem

    The fact that π cot(πz) has simple poles with residue 1 at each integer can be used to compute the sum = (). Consider, for example, f(z) = z −2. Let Γ N be the rectangle that is the boundary of [−N − ⁠ 1 / 2 ⁠, N + ⁠ 1 / 2 ⁠] 2 with positive orientation, with an integer N. By the residue formula,

  5. Area of a triangle - Wikipedia

    en.wikipedia.org/wiki/Area_of_a_triangle

    The above formula is known as the shoelace formula or the surveyor's formula. If we locate the vertices in the complex plane and denote them in counterclockwise sequence as a = x A + y A i , b = x B + y B i , and c = x C + y C i , and denote their complex conjugates as a ¯ {\displaystyle {\bar {a}}} , b ¯ {\displaystyle {\bar {b}}} , and c ...

  6. Cost of transport - Wikipedia

    en.wikipedia.org/wiki/Cost_of_transport

    The optimal speed if both energy and distance traveled in a given time are taken into account (with some "price" for each) may be faster or slower than the speed giving the lowest COT. Previously it was thought that a running person (unlike running animals) uses the same energy whether they run a distance slowly or fast.

  7. Yellowstone Park shooter spewed racist views before attack ...

    www.aol.com/yellowstone-park-shooter-spewed...

    The man who authorities say tried to carry out a mass shooting in Yellowstone National Park last year spewed racist views months before his attempted attack, prosecutors said in court documents ...

  8. Cot-1 - Wikipedia

    en.wikipedia.org/wiki/Cot-1

    Cot-1, COT-1, cot-1, or cot −1 may refer to: Cot-1 DNA , used in comparative genomic hybridization cot −1 y = cot −1 ( y ), sometimes interpreted as arccot( y ) or arccotangent of y , the compositional inverse of the trigonometric function cotangent (see below for ambiguity)

  9. Today's Wordle Hint, Answer for #1298 on Tuesday ... - AOL

    www.aol.com/todays-wordle-hint-answer-1298...

    SPOILERS BELOW—do not scroll any further if you don't want the answer revealed. The New York Times. Today's Wordle Answer for #1298 on Tuesday, January 7, 2025.