# Trigonometry Forum

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

1. ### [SOLVED] Double angle identities

• Replies: 3
• Views: 623
Feb 25th 2009, 03:05 AM
2. ### roots between 100π and 1000π Praxis II

• Replies: 1
• Views: 687
Feb 24th 2009, 07:46 PM
3. ### Trig Equations

• Replies: 1
• Views: 679
Feb 24th 2009, 11:08 AM
4. ### solve 8 sin (theta)-15cos(theta)=8.5

• Replies: 1
• Views: 1,190
Feb 24th 2009, 08:37 AM
5. ### Trig Functions & Unit Circle

• Replies: 1
• Views: 1,323
Feb 23rd 2009, 11:37 PM
6. ### Simplifying Trigonometric Equations

• Replies: 2
• Views: 537
Feb 23rd 2009, 04:32 PM
7. ### complex number polar form

• Replies: 1
• Views: 590
Feb 23rd 2009, 11:26 AM
8. ### establishing identities?

• Replies: 3
• Views: 540
Feb 23rd 2009, 06:55 AM
9. ### inverse functions in equations

• Replies: 4
• Views: 461
Feb 23rd 2009, 02:55 AM
10. ### basic trigonometry problems, help?

• Replies: 2
• Views: 592
Feb 23rd 2009, 12:41 AM
11. ### trigonomety word problem

• Replies: 2
• Views: 586
Feb 22nd 2009, 09:02 PM
12. ### trig problem

• Replies: 9
• Views: 444
Feb 22nd 2009, 04:10 PM
13. ### why is cot of 90= 0

• Replies: 2
• Views: 547
Feb 22nd 2009, 07:40 AM
14. ### What does a comma mean in a trig formula?

• Replies: 2
• Views: 4,459
Feb 22nd 2009, 03:57 AM
15. ### Help w/ Trig Questions

• Replies: 1
• Views: 627
Feb 21st 2009, 10:55 PM
16. ### h(31)=?

• Replies: 3
• Views: 435
Feb 21st 2009, 10:10 PM
17. ### Prove that tan(pi/15) is ...

• Replies: 2
• Views: 645
Feb 21st 2009, 01:55 PM
18. ### Sine/Cosine Equations

• Replies: 2
• Views: 893
Feb 21st 2009, 02:17 AM
19. ### Solving trig equations- Stuck at the double angle forumla

• Replies: 4
• Views: 907
Feb 20th 2009, 09:24 PM
20. ### BASIC Grade 11 Trigonometry Question on tan, cosec, sec, cot

• Replies: 2
• Views: 735
Feb 20th 2009, 07:25 PM
21. ### Trig equation

• Replies: 3
• Views: 1,400
Feb 20th 2009, 05:34 PM
22. ### what is this called?

• Replies: 2
• Views: 644
Feb 20th 2009, 04:52 AM
23. ### [SOLVED] Prove that this is true:

• Replies: 2
• Views: 618
Feb 20th 2009, 12:26 AM
24. ### Trigonometry (Pre-Cal)

• Replies: 3
• Views: 492
Feb 19th 2009, 07:28 PM

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