# Trigonometry: Trending topics

The following are the current most viewed articles on Wikipedia within Wikipedia's Trigonometry category. Think of it as a What's Hot list for Trigonometry. More info »

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Rank Topic Wikipedia views
1 Pi 18,232
2 Trigonometric functions 12,003
3 Trigonometry 6,771
4 Inverse trigonometric functions 4,158
5 Law of cosines 4,150
6 Angle 3,856
8 Unit circle 3,638
9 Euler's formula 3,559
10 Sine wave 3,317
11 Law of sines 1,927
12 Sine 1,498
13 Hypotenuse 1,104
14 List of integrals of trigonometric functions 756
15 Atan2 726
16 Right angle 632
17 Secant line 571
18 History of trigonometry 539
19 Trigonometric substitution 488
20 Uses of trigonometry 448
21 Chord (geometry) 393
22 Law of tangents 338
23 Argument (complex analysis) 311
24 Proofs of trigonometric identities 284
25 Pythagorean trigonometric identity 277
26 Tangent half-angle formula 217
27 Versine 208
28 Exact trigonometric constants 194
29 Equant 158
30 Generalized trigonometry 130
31 Generating trigonometric tables 128
32 Angular distance 126
33 Trigonometric integral 123
34 Resection (orientation) 103
35 Trigonometric polynomial 99
36 All Students Take Calculus 95
37 Āryabhaṭa's sine table 90
38 Phase response 78
39 Outline of trigonometry 76
40 Prosthaphaeresis 65
41 Mollweide's formula 59
42 Solution of triangles 55
43 Trigonometric interpolation 53
44 Gudermannian function 52
45 Rational trigonometry 50
46 Exsecant 49
47 Trigonometric series 48
48 Abbe sine condition 43
49 Abbe error 34
50 Jyā, koti-jyā and utkrama-jyā 34
51 List of trigonometry topics 30
53 Trigonometry in Galois fields 28
54 Arm solution 25
55 Cofunction 22
56 Bhaskara I's sine approximation formula 22
57 Morrie's law 21
58 Belt problem 20
59 Hypot 20
60 Snellius–Pothenot problem 19
62 Altern base 19
63 Brocard points 19
64 Polar sine 13
65 Hansen's problem 12
66 Estimation of signal parameters via rotational invariance techniques 9
67 Regiomontanus' angle maximization problem 9
68 Integrals of trigonometric functions less than 5 views
69 Trigonometry topics less than 5 views
70 Trigonometric identities less than 5 views

# Encyclopedia

Updated live from Wikipedia, last check: June 17, 2013 10:10 UTC (35 seconds ago)

Trigonometry (from the Greek trigonon = three angles and metro = measure) is a branch of mathematics dealing with angles, triangles and trigonometric functions such as sine, cosine and tangent. It has some relationship to geometry, though there is disagreement on exactly what that relationship is; for some, trigonometry is just a subtopic of geometry.

The main article for this category is Trigonometry.

## Subcategories

This category has only the following subcategory.

## Pages in category "Trigonometry"

The following 61 pages are in this category, out of 61 total. This list may not reflect recent changes (learn more).

## Media in category "Trigonometry"

The following 42 files are in this category, out of 42 total.

# Study guide

Up to date as of January 14, 2010

## Pages in category "Trigonometry"

The following 10 pages are in this category, out of 10 total.

# Wiktionary

Up to date as of January 14, 2010

### Definition from Wiktionary, a free dictionary

Articles on this topic in other Wikimedia projects can be found at: Wikimedia Commons Category Trigonometry
Wikipedia has a category on:

Wikipedia

The following is a list of words related to trigonometry.

## Subcategories

This category has the following 17 subcategories, out of 17 total.

## Entries in category “Trigonometry”

The following 41 pages are in this category, out of 41 total.

# Wikibooks

Up to date as of January 23, 2010

### From Wikibooks, the open-content textbooks collection

This category contains pages that are part of the Trigonometry book.

## Related categories

The following related category may be of interest.

## Books or Pages

The following 33 pages are in this category, out of 33 total.