# Trigonometry Forum

Trigonometry Help Forum: Graphing trig expressions, identities, angles, applied questions

1. ### How to find the angle and direction of a rotation matrix in 2D?

• Replies: 1
• Views: 1,395
Oct 17th 2012, 01:20 PM
2. ### Help with solving trig expressions - especially with half angle identities

• Replies: 1
• Views: 527
Oct 16th 2012, 01:13 AM
3. ### More trig simplification

• Replies: 3
• Views: 411
Oct 15th 2012, 07:07 PM
4. ### Finding x in Trig

• Replies: 5
• Views: 670
Oct 15th 2012, 05:54 PM
5. ### Simplifying trig functions

• Replies: 2
• Views: 246
Oct 15th 2012, 05:11 PM
6. ### Tan

• Replies: 7
• Views: 2,729
Oct 14th 2012, 06:10 PM

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8. ### How to find the inverse tangent since the calculator is limited

• Replies: 3
• Views: 771
Oct 13th 2012, 10:44 AM
9. ### Trigo surds question

• Replies: 1
• Views: 620
Oct 13th 2012, 01:16 AM
10. ### Basic Trig issue

• Replies: 2
• Views: 379
Oct 12th 2012, 11:21 PM
11. ### Linear Programming and systems, HELP ME! :(

• Replies: 3
• Views: 3,068
Oct 11th 2012, 08:29 PM
12. ### Trigonometric equation involving (sin x ) ^ 2

• Replies: 5
• Views: 417
Oct 11th 2012, 12:08 PM
13. ### direction component of vector without case analysis

• Replies: 3
• Views: 715
Oct 11th 2012, 06:56 AM
14. ### cos x = sqrt(3)/2

• Replies: 3
• Views: 27,926
Oct 9th 2012, 10:18 AM
15. ### trig equation,

• Replies: 5
• Views: 792
Oct 8th 2012, 01:06 PM
16. ### finding positive angles for inverse functions

• Replies: 4
• Views: 874
Oct 8th 2012, 11:56 AM
17. ### simplify trg expression

• Replies: 1
• Views: 553
Oct 8th 2012, 09:24 AM
18. ### Need help simplifying a trigonometric expression

• Replies: 3
• Views: 720
Oct 8th 2012, 08:43 AM
19. ### cos pi/6

• Replies: 4
• Views: 2,369
Oct 8th 2012, 07:18 AM

• Replies: 1
• Views: 595
Oct 7th 2012, 08:45 PM
21. ### Unit Circle Stuff

• Replies: 3
• Views: 1,907
Oct 7th 2012, 04:41 PM
22. ### Help needed

• Replies: 11
• Views: 1,067
Oct 7th 2012, 07:18 AM
23. ### Deriving trigonmetric identities, little confused?

• Replies: 3
• Views: 582
Oct 5th 2012, 11:42 PM

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