# Trigonometry Forum

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

1. ### What exactly is a "Double Angle"?

• Replies: 2
• Views: 788
Feb 27th 2011, 07:24 PM
2. ### Challenging trigonometry problem

• Replies: 7
• Views: 756
Feb 27th 2011, 12:07 PM
3. ### Manipulation of trig functions.

• Replies: 2
• Views: 863
Feb 27th 2011, 05:12 AM
4. ### identity

• Replies: 6
• Views: 561
Feb 26th 2011, 09:01 PM
5. ### Graphing cos^2(x) or any other function like that.

• Replies: 1
• Views: 472
Feb 26th 2011, 08:33 PM
6. ### equality trigonometry

• Replies: 2
• Views: 431
Feb 26th 2011, 01:08 PM
7. ### Quotient of sum and product of sines.

• Replies: 1
• Views: 1,011
Feb 26th 2011, 01:02 PM
8. ### Finding a sum of sines and cosines.

• Replies: 1
• Views: 452
Feb 26th 2011, 01:01 PM
9. ### Proving expression with sines.

• Replies: 1
• Views: 462
Feb 26th 2011, 01:00 PM
10. ### Sum of sines.

• Replies: 1
• Views: 429
Feb 26th 2011, 12:59 PM
11. ### Sum of cosines #2

• Replies: 1
• Views: 436
Feb 26th 2011, 12:58 PM
12. ### Product of cosines.

• Replies: 1
• Views: 472
Feb 26th 2011, 12:57 PM
13. ### Sum of squares of cosine.

• Replies: 1
• Views: 686
Feb 26th 2011, 12:56 PM
14. ### Trigonometry 2

• Replies: 4
• Views: 397
Feb 26th 2011, 12:55 PM
15. ### Sum of cosines.

• Replies: 1
• Views: 486
Feb 26th 2011, 12:53 PM
16. ### A simple but mind twisting one

• Replies: 3
• Views: 608
Feb 26th 2011, 11:12 AM
17. ### Find tan from sin.

• Replies: 1
• Views: 628
Feb 26th 2011, 10:24 AM
18. ### Question about sine and cosine law

• Replies: 3
• Views: 747
Feb 26th 2011, 08:02 AM
19. ### simple trig equation

• Replies: 5
• Views: 800
Feb 25th 2011, 11:13 PM
20. ### Solving 13sinx-84sinx = 17

• Replies: 4
• Views: 943
Feb 25th 2011, 06:04 PM
21. ### Trig eqn cos(x+TT/6) + cos(x-TT/4) = 0

• Replies: 9
• Views: 937
Feb 25th 2011, 04:20 PM
22. ### Two questions about vectors and scalars?

• Replies: 2
• Views: 934
Feb 25th 2011, 05:01 AM

• Replies: 1
• Views: 483
Feb 25th 2011, 02:34 AM
24. ### Trigonometric functions?

• Replies: 1
• Views: 448
Feb 25th 2011, 12:28 AM
25. ### Determining amplitude and period

• Replies: 1
• Views: 1,042
Feb 24th 2011, 10:42 PM
26. ### Projections

• Replies: 2
• Views: 601
Feb 24th 2011, 04:05 PM
27. ### Angle with geometric vectors

• Replies: 2
• Views: 990
Feb 24th 2011, 02:47 PM
28. ### 3cosx+4tanx+secx=0

• Replies: 6
• Views: 934
Feb 24th 2011, 01:29 PM

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