# Trigonometry Forum

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

1. ### Sin or Cos - how do you work these out without a calculator???

• Replies: 2
• Views: 606
Jul 7th 2009, 05:47 AM
2. ### Prove that

• Replies: 3
• Views: 1,375
Jul 7th 2009, 12:05 AM
3. ### Solve it without using calculaters

• Replies: 5
• Views: 336
Jul 6th 2009, 09:09 PM
4. ### Prove that

• Replies: 4
• Views: 1,024
Jul 6th 2009, 06:31 PM
5. ### Another trigonometric equation

• Replies: 2
• Views: 512
Jul 6th 2009, 06:25 PM
6. ### Trigonometric Equation

• Replies: 2
• Views: 667
Jul 6th 2009, 01:37 PM
7. ### Trigonomertric identities

• Replies: 1
• Views: 659
Jul 6th 2009, 07:24 AM
8. ### Compound angle formula help

• Replies: 2
• Views: 599
Jul 6th 2009, 06:32 AM
9. ### tan cot sec

• Replies: 3
• Views: 477
Jul 6th 2009, 03:31 AM
10. ### Two electricity pylons P and Q are 550m apart on the same side of a river. .(continue

• Replies: 2
• Views: 440
Jul 6th 2009, 02:04 AM
11. ### Is this the correct area of this triangle?

• Replies: 9
• Views: 563
Jul 6th 2009, 01:06 AM
12. ### What is the length from B to C? What is the area of triangle?

• Replies: 3
• Views: 560
Jul 5th 2009, 10:57 PM
13. ### Inverse trigonometric function

• Replies: 2
• Views: 471
Jul 5th 2009, 10:00 PM
14. ### Sine/ Cosine Rule Problems

• Replies: 5
• Views: 692
Jul 5th 2009, 06:42 PM
15. ### Having trouble with these 5 trig exercises

• Replies: 9
• Views: 669
Jul 5th 2009, 02:39 PM
16. ### [SOLVED] Solving trig equations

• Replies: 2
• Views: 460
Jul 5th 2009, 12:49 PM
17. ### simple trig identities

• Replies: 7
• Views: 454
Jul 5th 2009, 07:27 AM
18. ### Angular velocity

• Replies: 3
• Views: 2,251
Jul 5th 2009, 05:41 AM
19. ### Show that the area of the large square in the diagram can be written as (x+y)², and..

• Replies: 4
• Views: 676
Jul 5th 2009, 03:00 AM
20. ### Prove that

• Replies: 2
• Views: 466
Jul 4th 2009, 09:41 AM
21. ### [SOLVED] Trig equation

• Replies: 10
• Views: 549
Jul 4th 2009, 08:38 AM
22. ### Prove that

• Replies: 1
• Views: 259
Jul 4th 2009, 06:19 AM
23. ### Identities

• Replies: 1
• Views: 541
Jul 3rd 2009, 10:32 PM
24. ### Some Trig Help: Find the exact value of cos(−5pi/12)

• Replies: 2
• Views: 6,531
Jul 3rd 2009, 04:11 PM
25. ### Solution and Deduction

• Replies: 9
• Views: 506
Jul 3rd 2009, 12:14 PM
26. ### [SOLVED] Value of sin2x and cos2x when tanx=5/3

• Replies: 11
• Views: 2,751
Jul 3rd 2009, 06:07 AM

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