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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
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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,
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 ...
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.
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 ...
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)
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.