Summary of trigonometric identities
Trigonometric identities
List of trigonometric identities - Wikipedia, the free encyclopedia
Trigonometric functions - Wikipedia, the free encyclopedia
[/si[size=16]Mathwords: Trig Identities -ze]
Algebra II: Trigonometric Identities - Math for Morons Like Us
Free Trigonometry Tutorials and Problems -
Trigonometric Identities@Everything2.com
Trigonometric Identities
Trigonometric identities - AoPSWiki
http://www.tutorvista.com/content/math/trigonometry/trigonometry-xi/tangent-functions.php
Trigonometric Ratios Tangent - TutorVista.com
Trigonometric identities
List of trigonometric identities - Wikipedia, the free encyclopedia
Trigonometric functions - Wikipedia, the free encyclopedia
[/si[size=16]Mathwords: Trig Identities -ze]
Algebra II: Trigonometric Identities - Math for Morons Like Us
Free Trigonometry Tutorials and Problems -
Trigonometric Identities@Everything2.com
Trigonometric Identities
Trigonometric identities - AoPSWiki
http://www.tutorvista.com/content/math/trigonometry/trigonometry-xi/tangent-functions.php
Trigonometric Ratios Tangent - TutorVista.com