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2. Law of tangents - Wikipedia

   en.wikipedia.org/wiki/Law_of_tangents

   To prove the law of tangents one can start with the law of sines: ⁡ = ⁡ =, where ⁠ ⁠ is the diameter of the circumcircle, so that ⁠ = ⁡ ⁠ and ⁠ = ⁡ ⁠.. It follows that

3. Inverse trigonometric functions - Wikipedia

   en.wikipedia.org/wiki/Inverse_trigonometric...

   A Riemann surface for the argument of the relation tan z = x. The orange sheet in the middle is the principal sheet representing arctan x. The blue sheet above and green sheet below are displaced by 2π and −2π respectively. Since the inverse trigonometric functions are analytic functions, they can be extended from the real line to the ...

4. Tan-1 - Wikipedia

   en.wikipedia.org/wiki/Tan-1

   tan −1 y = tan −1 (x), sometimes interpreted as arctan(x) or arctangent of x, the compositional inverse of the trigonometric function tangent (see below for ambiguity) tan −1 x = tan −1 ( x ), sometimes interpreted as (tan( x )) −1 = ⁠ 1 / tan( x ) ⁠ = cot( x ) or cotangent of x , the multiplicative inverse (or reciprocal) of the ...

5. Outline of trigonometry - Wikipedia

   en.wikipedia.org/wiki/Outline_of_trigonometry

   Ebook version, in PDF format, full text presented. Trigonometry by Alfred Monroe Kenyon and Louis Ingold, The Macmillan Company, 1914. In images, full text presented. Trigonometry FAQ; Trigonometry on Mathwords.com index of trigonometry entries on Mathwords.com; Trigonometry on PlainMath.net Trigonometry Articles from PlainMath.Net

6. Trigonometry - Wikipedia

   en.wikipedia.org/wiki/Trigonometry

   Trigonometry (from Ancient Greek τρίγωνον (trígōnon) 'triangle' and μέτρον (métron) 'measure') [1] is a branch of mathematics concerned with relationships between angles and side lengths of triangles.

7. Template:Trigonometry - Wikipedia

   en.wikipedia.org/wiki/Template:Trigonometry

   Template documentation This will be a list of the articles related to trigonometry - at the moment they are all spread out and overlap too much; they need focusing. Editors can experiment in this template's sandbox ( create | mirror ) and testcases ( create ) pages.