Talk:Trigonometric function

**Article Checklist for "Trigonometric function"**
Workgroup category or categories	Mathematics Workgroup [Categories OK]
Article status	External article: from another source, with little change
Underlinked article?	Yes
Basic cleanup done?	No
Checklist last edited by	--AlekStos 12:18, 8 March 2007 (CST)

To learn how to fill out this checklist, please see CZ:The Article Checklist.

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Image:Circle-trig6.svg|300px|right|thumb|All of the trigonometric functions of an angle θ can be constructed geometrically in terms of a unit circle centered at O.
Image:Trigonometry triangle.svg|right|thumb|A right triangle always includes a 90° (π/2 radians) angle, here labeled C. Angles A and B may vary. Trigonometric functions specify the relationships between side lengths and interior angles of a right triangle.
Image:Unit_circle_angles.svg|300px|thumb|right|The unit circle
Image:Sine cosine plot.svg|300px|right|thumb|The f(x) = sin(x) and f(x) = cos(x) functions graphed on the cartesian plane.
Image:Sine ani.gif|right|400px|thumb|A sin(x) animation which shows the connection between circle and sine.
Image:Tangent.svg|300px|right|thumb|The f(x) = tan(x) function graphed on the cartesian plane.
Image:Circle-trig6.svg|300px|right|thumb|All of the trigonometric functions can be constructed geometrically in terms of a unit circle centered at O.
Image:Taylorsine.svg|300px|thumb|right|The sine function (blue) is closely approximated by its Taylor polynomial of degree 7 (pink) for a full cycle centered on the origin.
Image:Synthesis_square.gif|thumb|350px|right|Animation of the additive synthesis of a square wave with an increasing number of harmonics
Image:LissajousCurve5by4.PNG|right|thumb|right|A Lissajous curve, a figure formed with a trigonometry-based function.