Trigonometric Functions

https://www.desmos.com/calculator
http://rechneronline.de/function-graphs/
http://graphsketch.com/
http://simulation-math.com/
http://campus.kellerisd.net/Teachers/25118/Lists/Announcements/Attachments/4/Online%20TI-84+%20Calculator.pdf

Function Transformations from the Wolfram Demonstrations Project by Eric Schulz

http://www.intmath.com/trigonometric-graphs/1-graphs-sine-cosine-amplitude.php

http://www.purplemath.com/modules/triggrph.htm

http://interactivemaths.net/index.php?q=category/1/35/111

Transformations of the Trig Functions with Geogebra

http://geogebra.org

Transformations of the Sine Curve

http://www.absorblearning.com/media/attachment.action?quick=ji&att=1396

http://www.absorblearning.com/media/attachment.action?quick=ot&att=1778

http://www.absorblearning.com/media/attachment.action?quick=ou&att=1780

http://tube.geogebra.org/student/m95659

Graphs of the Reciprocal Trigonometric Functions