# Trigonometry Forum

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

1. ### Complex Numbers

• Replies: 1
• Views: 298
Mar 3rd 2009, 11:33 PM
2. ### Polar Equations

• Replies: 2
• Views: 315
Mar 3rd 2009, 09:43 PM
3. ### Trigonometry test question urgent

• Replies: 1
• Views: 432
Mar 3rd 2009, 09:22 PM
4. ### Equations involving trig identities/formulae

• Replies: 3
• Views: 1,000
Mar 3rd 2009, 08:07 PM
5. ### Addition of sine & cosine?

• Replies: 2
• Views: 1,061
Mar 2nd 2009, 10:49 PM
6. ### solving Trig Equations...HELP pleeze!

• Replies: 1
• Views: 440
Mar 2nd 2009, 10:33 PM
7. ### De Moivre's theorem.

• Replies: 2
• Views: 8,857
Mar 2nd 2009, 07:23 PM
8. ### Simplifying sin(x+4)secx?

• Replies: 2
• Views: 572
Mar 2nd 2009, 06:38 AM
9. ### Getting exact answer from cos(u+-v) & sin(u+-v). Simple problem.

• Replies: 6
• Views: 1,171
Mar 2nd 2009, 05:06 AM
10. ### Simple Proving Problem

• Replies: 1
• Views: 710
Mar 2nd 2009, 04:55 AM
11. ### simple question

• Replies: 6
• Views: 687
Mar 1st 2009, 10:31 PM
12. ### When finding the argument to write a complex number in trigonometric form...

• Replies: 3
• Views: 695
Mar 1st 2009, 07:11 PM
13. ### Inverse trig functions involving the unit circle?

• Replies: 1
• Views: 1,848
Mar 1st 2009, 12:25 PM
14. ### Find tan3x in terms of tanx.

• Replies: 1
• Views: 3,914
Mar 1st 2009, 12:12 PM
15. ### trig

• Replies: 2
• Views: 528
Mar 1st 2009, 08:47 AM
16. ### Help me to prove this! My brainjuice is OVERHEATING!!!

• Replies: 2
• Views: 421
Mar 1st 2009, 06:49 AM
17. ### a sin θ + b cos θ = 0

• Replies: 4
• Views: 728
Mar 1st 2009, 06:26 AM
18. ### I am stuck on graphing a sine function, please help!

• Replies: 3
• Views: 762
Feb 28th 2009, 08:07 PM
19. ### Double and Half angle identities

• Replies: 1
• Views: 579
Feb 28th 2009, 06:23 PM
20. ### cosine of tangent

• Replies: 3
• Views: 1,063
Feb 28th 2009, 05:20 PM
21. ### Trigonometric Identities, need help fast!

• Replies: 2
• Views: 441
Feb 28th 2009, 04:33 PM
22. ### trig equality - stick

• Replies: 1
• Views: 655
Feb 28th 2009, 02:52 PM
23. ### Double angle trig identity

• Replies: 3
• Views: 627
Feb 28th 2009, 12:54 PM
24. ### roots of the equation

• Replies: 4
• Views: 811
Feb 28th 2009, 12:15 PM
25. ### how does this happen?

• Replies: 2
• Views: 559
Feb 28th 2009, 11:54 AM
26. ### Solving sum and difference identities

• Replies: 3
• Views: 841
Feb 28th 2009, 11:52 AM

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